Entity Names Starting With The Letter H |
Structure |
Reactions Forming |
Reactions Using |
Wikipedia |
NIST |
[H] |
[H] |
|
32 |
|
NIST |
H (histidine) |
 |
1 |
1 |
Wikipedia |
NIST |
H• |
H• |
20 |
10 |
Wikipedia |
NIST |
Hübnerite |
MnWO4 |
|
|
|
|
H+ |
H+ |
77 |
547 |
Wikipedia |
NIST |
H+/H2O |
H+(aq) |
|
15 |
|
|
H- |
H– |
|
36 |
Wikipedia |
NIST |
H2 |
H2 |
139 |
158 |
Wikipedia |
NIST |
[H2AsO4]- |
[H2AsO4]– |
1 |
1 |
|
NIST |
[H2As]- |
[H2As]– |
|
1 |
|
NIST |
[H2Br]+ |
[BrH2]+ |
1 |
|
|
NIST |
H2C=C=O |
H2C=C=O |
4 |
4 |
Wikipedia |
NIST |
H2CCO |
H2C=C=O |
4 |
4 |
Wikipedia |
NIST |
[H2Cl]+ |
[ClH2]+ |
1 |
|
|
NIST |
H2CO |
HCHO |
6 |
25 |
Wikipedia |
NIST |
H2CO3 |
H2CO3 |
1 |
|
Wikipedia |
NIST |
H2CrO4 |
H2CrO4 |
2 |
|
Wikipedia |
NIST |
[H2F]+ |
[FH2]+ |
2 |
|
|
NIST |
[H2GeO4]2- |
[H2GeO4]2– |
|
1 |
|
NIST |
H2N• |
H2N• |
|
|
|
NIST |
H2N2 |
HN=NH |
|
|
Wikipedia |
NIST |
H2NCH2CH2CH2CH2NH2 |
 |
2 |
|
Wikipedia |
NIST |
H2NCl |
H2NCl |
1 |
3 |
Wikipedia |
NIST |
H2NOH.HCl |
 |
1 |
|
Wikipedia |
NIST |
H2NSO2NH2 |
H2NSO2NH2 |
|
1 |
Wikipedia |
NIST |
[H2N]- |
[H2N]– |
2 |
18 |
|
NIST |
H2O |
H2O |
529 |
531 |
Wikipedia |
NIST |
H2O(g) |
H2O(g) |
3 |
1 |
Wikipedia |
NIST |
H2O2 |
HOOH |
12 |
30 |
Wikipedia |
NIST |
H2O3S |
H2SO3 |
4 |
2 |
Wikipedia |
NIST |
H2O4S |
H2SO4 |
25 |
74 |
Wikipedia |
NIST |
[H2PO2]- |
[H2PO2]– |
2 |
1 |
|
NIST |
[H2PO3]- |
[H3PO4]– |
1 |
1 |
|
NIST |
[H2PO4]- |
[H2PO4]– |
1 |
3 |
|
NIST |
H2PPH2 |
P2H6 |
|
|
Wikipedia |
NIST |
[H2P]- |
[H2P]– |
|
1 |
|
NIST |
H2S |
H2S |
10 |
22 |
Wikipedia |
NIST |
H2S(aq) |
H2S(aq) |
1 |
|
Wikipedia |
NIST |
H2S2 |
HSSH |
1 |
|
|
NIST |
H2S2O3 |
 |
1 |
1 |
Wikipedia |
NIST |
H2S2O4 |
 |
1 |
|
|
NIST |
H2S2O5 |
 |
1 |
|
|
NIST |
H2S2O6 |
 |
1 |
|
|
NIST |
H2S2O7 |
H2S2O7 |
1 |
6 |
Wikipedia |
NIST |
H2S2O8 |
 |
2 |
1 |
|
NIST |
H2S4O6 |
 |
1 |
|
|
NIST |
H2Se |
H2Se |
3 |
1 |
Wikipedia |
NIST |
H2SeO3 |
H2SeO3 |
2 |
1 |
Wikipedia |
NIST |
H2SeO4 |
 |
1 |
|
Wikipedia |
NIST |
[H2Se]- |
[H2Sb]– |
|
1 |
|
NIST |
H2SiF6(aq) |
H2SiF6(aq) |
2 |
1 |
Wikipedia |
NIST |
H2SO3 |
H2SO3 |
4 |
2 |
Wikipedia |
NIST |
H2SO4 |
H2SO4 |
25 |
74 |
Wikipedia |
NIST |
H2SO4(aq) |
H2SO4(aq) |
3 |
11 |
Wikipedia |
NIST |
H2SO5 |
 |
2 |
2 |
Wikipedia |
NIST |
H2Te |
H2Te |
1 |
2 |
Wikipedia |
NIST |
H2TeO3 |
H2TeO3 |
1 |
|
Wikipedia |
NIST |
[H2]+ |
[H2]+• |
2 |
1 |
|
NIST |
H3Al |
AlH3 |
|
2 |
Wikipedia |
NIST |
H3AsO4 |
H3AsO4 |
1 |
|
|
NIST |
H3B |
BH3 |
|
2 |
Wikipedia |
NIST |
H3BO3 |
H3BO3 |
10 |
9 |
Wikipedia |
NIST |
[H3GeO4]- |
[H3GeO4]– |
1 |
1 |
|
NIST |
[H3IO6]2- |
[H3IO6]2– |
|
1 |
|
NIST |
[H3N2]- |
[NH2–NH]– |
|
1 |
|
NIST |
H3P |
PH3 |
6 |
2 |
Wikipedia |
NIST |
H3PO2 |
H3PO2 |
2 |
2 |
Wikipedia |
NIST |
H3PO3 |
H3PO3 |
8 |
1 |
Wikipedia |
NIST |
H3PO4 |
H3PO4 |
8 |
7 |
Wikipedia |
NIST |
H3Sb |
H3Sb |
7 |
1 |
Wikipedia |
NIST |
[H3Si]- |
[H3Si]– |
|
1 |
|
NIST |
[H3]+ |
[H3]+ |
2 |
3 |
Wikipedia |
NIST |
H4Ge |
GeH4 |
3 |
|
Wikipedia |
NIST |
[H4IO6]- |
[H4IO6]– |
1 |
1 |
|
NIST |
H4P2O5 |
 |
|
|
|
NIST |
H4P2O6 |
 |
|
1 |
|
NIST |
H4P2O7 |
 |
2 |
|
Wikipedia |
NIST |
[H4P]+ |
[PH4]+ |
1 |
|
|
NIST |
H4Si |
SiH4 |
5 |
|
Wikipedia |
NIST |
Hadron, bosonic |
|
|
|
Wikipedia |
|
Hadron, fermionic |
|
|
|
Wikipedia |
|
Haem |
 |
1 |
|
Wikipedia |
NIST |
Haemoglobin |
 |
|
|
Wikipedia |
|
Hafnia |
HfO2 |
|
|
Wikipedia |
NIST |
Hafnium |
Hf |
|
|
Wikipedia |
NIST |
Hafnium(III) bromide |
HfBr3 |
|
|
|
NIST |
Hafnium(III) chloride |
HfCl3 |
|
|
|
NIST |
Hafnium(III) iodide |
HfI3 |
|
|
|
NIST |
Hafnium(IV) bromide |
HfBr4 |
|
|
|
NIST |
Hafnium(IV) chloride |
HfCl4 |
|
|
Wikipedia |
NIST |
Hafnium(IV) fluoride |
HfF4 |
|
|
|
NIST |
Hafnium(IV) iodide |
HfI4 |
|
|
|
NIST |
Hafnium(IV) oxide |
HfO2 |
|
|
Wikipedia |
NIST |
Halite |
NaCl halite |
|
|
Wikipedia |
|
Hallucinogen (generic) |
Hallucinogen |
|
|
Wikipedia |
|
alpha-Halo aldehyde or ketone (generic) |
 |
|
|
|
|
Haloalkane (AS/A2 generic) |
 |
|
2 |
Wikipedia |
|
Halogen (AS/A2 generic) |
 |
|
|
Wikipedia |
|
Halogen (generic) |
Group VIIa/17 Halogens |
|
|
Wikipedia |
|
Halogen anion (AS/A2 generic) |
 |
1 |
|
Wikipedia |
|
Halon |
CCl2F2 |
4 |
1 |
Wikipedia |
NIST |
Halon 104 |
CCl4 |
11 |
5 |
Wikipedia |
NIST |
Hard Lewis acid (generic) |
 |
|
|
Wikipedia |
|
Hard Lewis base (generic) |
 |
|
|
Wikipedia |
|
Hard margarine |
Hard Margarine |
1 |
|
Wikipedia |
NIST |
HArF |
H–Ar–F |
1 |
|
Wikipedia |
NIST |
Harmotome |
(Ba0.5,Ca0.5,Na,K)5 Al5,Si11O32. 12H2O |
|
|
Wikipedia |
|
Hartshorn |
(NH4)2CO3 |
|
1 |
Wikipedia |
NIST |
[HAsO4]2- |
[HAsO4]2– |
1 |
1 |
|
NIST |
Hassium |
Hs |
|
|
Wikipedia |
NIST |
Hausmannite |
Mn3O4 |
|
1 |
|
NIST |
Haüyne |
Na3Ca(Si3Al3) O12(SO4) |
|
|
Wikipedia |
|
HBF4 |
H+ [BF4]– |
2 |
|
Wikipedia |
NIST |
HBF4 |
HBF4(aq) |
2 |
1 |
Wikipedia |
NIST |
HBO2 |
HBO2 |
2 |
1 |
Wikipedia |
NIST |
HBr |
HBr |
22 |
20 |
Wikipedia |
NIST |
HBr/CH3COOH |
HBr in CH3COOH 30% W/W |
1 |
|
|
NIST |
HBrO |
HOBr |
4 |
1 |
Wikipedia |
NIST |
HBrO3 |
HBrO3 |
2 |
|
Wikipedia |
NIST |
HCCH |
HC≡CH |
9 |
25 |
Wikipedia |
NIST |
HCClF2 |
HCClF2 |
1 |
1 |
Wikipedia |
NIST |
[HCC]- |
HC≡C– |
1 |
2 |
Wikipedia |
NIST |
HCHO |
HCHO |
6 |
25 |
Wikipedia |
NIST |
HCl |
HCl |
107 |
50 |
Wikipedia |
NIST |
HCl + NO3 |
Aqua Regia |
1 |
2 |
Wikipedia |
NIST |
HCl(aq) |
HCl(aq) |
2 |
13 |
Wikipedia |
NIST |
HCl(conc) |
HCl(conc) |
2 |
9 |
Wikipedia |
NIST |
HClO |
HClO |
6 |
4 |
Wikipedia |
NIST |
HClO2 |
HClO2 |
2 |
|
Wikipedia |
NIST |
HClO3 |
HClO3 |
2 |
1 |
Wikipedia |
NIST |
HClO4 |
HClO4 |
4 |
1 |
Wikipedia |
NIST |
HCN |
HCN |
5 |
18 |
Wikipedia |
NIST |
HCo(CO)3 |
HCo(CO)3 |
2 |
1 |
|
NIST |
HCo(CO)4 |
HCo(CO)4 |
1 |
1 |
|
NIST |
[HCO3]- |
[HCO3]– |
4 |
5 |
|
NIST |
HCOCl |
 |
1 |
|
|
NIST |
HCONH2 |
HCONH2 |
2 |
2 |
Wikipedia |
NIST |
HCOOCH3 |
 |
2 |
5 |
Wikipedia |
NIST |
HCOOH |
HCOOH |
7 |
2 |
Wikipedia |
NIST |
HCOONa |
HCOONa |
5 |
2 |
Wikipedia |
NIST |
HCOOR |
HCOOR |
1 |
|
|
|
[HCOO]- |
[HCOO]– |
|
1 |
Wikipedia |
NIST |
[HCrO4]- |
[HCrO4]– |
|
|
|
NIST |
HD |
HD |
1 |
|
|
NIST |
He |
He |
2 |
1 |
Wikipedia |
NIST |
Heavy distillate |
Fuel oil |
1 |
2 |
Wikipedia |
NIST |
Heavy hydrogen |
D2 |
1 |
1 |
Wikipedia |
NIST |
Heavy metal Lewis acid (generic) |
 |
|
4 |
Wikipedia |
|
Heavy water |
D2 |
|
1 |
Wikipedia |
NIST |
Helium |
He |
2 |
1 |
Wikipedia |
NIST |
Helium 3 |
3H |
1 |
1 |
Wikipedia |
NIST |
Helium 4 |
α |
44 |
6 |
Wikipedia |
NIST |
Helium family (generic) |
Group VIIIa/18 Noble Gases |
|
|
Wikipedia |
|
Helonium ion |
[HHe]+ |
1 |
|
|
NIST |
Hematite |
Fe2O3 |
|
1 |
Wikipedia |
|
Hemiacetal (generic) |
 |
1 |
|
Wikipedia |
|
Hemiketal (generic) |
 |
1 |
|
Wikipedia |
|
Hemimorphite |
Zn3Si2O7(OH)2 .H3O |
|
|
Wikipedia |
|
Heneicosane |
 |
|
1 |
Wikipedia |
NIST |
Hepta-5-ene-2,3-dicarboxylic anhydride |
 |
1 |
|
|
NIST |
Heptane |
 |
|
1 |
|
NIST |
Heptane, bicyclio[4.1.0] |
 |
1 |
|
|
NIST |
Heroin |
 |
1 |
|
Wikipedia |
NIST |
Heteroauxin |
 |
|
|
Wikipedia |
NIST |
5 Heterocycle (generic) |
 |
|
|
Wikipedia |
|
6 Heterocycle (generic) |
 |
|
|
Wikipedia |
|
Heterocycle, polycyclic (generic) |
 |
|
|
Wikipedia |
|
Heterogeneous mixture (generic) |
|
|
|
Wikipedia |
|
Heulandite |
Ca,Na)2-3Al3 (Al,Si)2Si13O36 .12H2O |
|
|
Wikipedia |
|
Hexaamminochromium(III) ion |
|
2 |
|
|
NIST |
Hexaamminocobalt(II) ion |
|
1 |
3 |
|
NIST |
Hexaamminocobalt(III) ion |
|
2 |
|
|
NIST |
Hexaaquaaluminium complex ion |
[Al(H2O)6]3+ |
2 |
6 |
|
NIST |
Hexaaquachromium(II) ion |
|
3 |
|
|
NIST |
Hexaaquachromium(III) ion |
|
3 |
9 |
|
NIST |
Hexaaquacobolt(II) ion |
|
4 |
10 |
|
NIST |
Hexaaquacopper(II) ion |
|
3 |
8 |
|
NIST |
Hexaaquairon(II) ion |
|
3 |
10 |
|
NIST |
Hexaaquairon(III) ion |
|
6 |
9 |
|
NIST |
Hexaaquamanganese(II) ion |
|
5 |
|
|
NIST |
Hexaaquavanadium(II) ion |
|
4 |
|
|
NIST |
Hexaaquavanadium(III) ion |
|
2 |
1 |
|
NIST |
Hexadecanoic acid |
CH3(CH2)14COOH |
6 |
|
Wikipedia |
NIST |
(9Z)-Hexadecenoic acid |
Palmitoleic Acid |
|
|
Wikipedia |
NIST |
(2E, 4E)-Hexadiene |
 |
|
2 |
|
NIST |
(2E, 4Z)-Hexadiene |
 |
|
2 |
|
NIST |
Hexafluoroaluminate ion |
[AlF6]3– |
|
1 |
|
NIST |
Hexafluoroantimonate(V) |
[SbF6]– |
2 |
1 |
|
NIST |
Hexafluoroarsinate ion |
[AsF6]– |
3 |
1 |
|
NIST |
Hexafluoroethane |
C2F6 |
1 |
|
Wikipedia |
NIST |
Hexafluoropalladium(IV) |
[PdF6]2– |
|
|
|
NIST |
Hexafluoroplatinate ion |
[PtF6]– |
1 |
1 |
|
NIST |
Hexafluorosilicate ion |
[SiF6]2– |
2 |
2 |
|
NIST |
Hexafluorosilicic acid (aqueous) |
H2SiF6(aq) |
2 |
1 |
Wikipedia |
NIST |
Hexafluorosulfur |
SF6 |
5 |
|
Wikipedia |
NIST |
4,4a,5,6,7,8- Hexahydro-2(3H)- naphthalenone |
 |
|
4 |
|
NIST |
Hexahydrobenzoic acid |
 |
1 |
1 |
|
NIST |
Hexahydroiron(II) ion |
[FeH6]4– |
1 |
1 |
|
NIST |
Hexahydroxychromium(III) ion |
|
2 |
1 |
|
NIST |
1,2,3,4,5,6-Hexahydroxyhexane |
 |
1 |
|
Wikipedia |
NIST |
3,3,6,6,9,9-Hexamethyl-1,2,4,5,7,8-hexoxonane |
 |
1 |
1 |
Wikipedia |
NIST |
Hexamethylene |
 |
5 |
7 |
Wikipedia |
NIST |
Hexamethylenediamine |
 |
1 |
1 |
Wikipedia |
NIST |
Hexamethylenetetramine |
 |
1 |
2 |
Wikipedia |
NIST |
Hexamethylphosphoramide |
HMPA |
|
|
Wikipedia |
NIST |
Hexamethylphosphoric triamide |
HMPA |
|
|
Wikipedia |
NIST |
Hexamine |
 |
1 |
2 |
Wikipedia |
NIST |
Hexane |
 |
1 |
5 |
Wikipedia |
NIST |
Hexane-1,6-diamine |
 |
1 |
1 |
Wikipedia |
NIST |
Hexanedioic acid |
 |
4 |
3 |
Wikipedia |
NIST |
6-Hexanolactone |
 |
1 |
|
Wikipedia |
NIST |
1,3,5-Hexatriene |
 |
|
|
|
NIST |
HF |
HF |
30 |
39 |
Wikipedia |
NIST |
Hf |
Hf |
|
|
Wikipedia |
NIST |
(HF)6 |
(HF)6 |
1 |
|
Wikipedia |
NIST |
HfBr3 |
HfBr3 |
|
|
|
NIST |
HfBr4 |
HfBr4 |
|
|
|
NIST |
HfCl3 |
HfCl3 |
|
|
|
NIST |
HfCl4 |
HfCl4 |
|
|
Wikipedia |
NIST |
HfF4 |
HfF4 |
|
|
|
NIST |
HfI3 |
HfI3 |
|
|
|
NIST |
HfI4 |
HfI4 |
|
|
|
NIST |
HfO2 |
HfO2 |
|
|
Wikipedia |
NIST |
HFO3S |
HSO3F |
2 |
2 |
Wikipedia |
NIST |
Hg |
Hg |
4 |
1 |
Wikipedia |
NIST |
Hg(NO3)2 |
Hg(NO3)2 |
1 |
1 |
Wikipedia |
NIST |
Hg(OAc)2 |
Hg(OCOCH3)2 |
1 |
|
Wikipedia |
NIST |
Hg(ONC)2 |
Hg(ONC)2 |
2 |
|
Wikipedia |
NIST |
Hg2+ |
Hg2+ |
|
9 |
|
NIST |
Hg2Br2 |
Hg2Br2 |
1 |
|
|
NIST |
Hg2Cl2 |
Hg2Cl2 |
1 |
1 |
Wikipedia |
NIST |
Hg2F2 |
Hg2F2 |
|
|
|
NIST |
Hg2I2 |
Hg2I2 |
1 |
|
|
NIST |
Hg2O |
Hg2O |
|
|
|
NIST |
Hg2S |
Hg2S |
1 |
|
|
NIST |
[Hg2]2+ |
Hg23+ |
1 |
5 |
|
NIST |
HgBr2 |
HgBr2 |
|
|
|
NIST |
HgCl2 |
HgCl2 |
2 |
1 |
Wikipedia |
NIST |
HgF2 |
HgF2 |
|
|
Wikipedia |
NIST |
HgI2 |
HgI2 |
|
|
Wikipedia |
NIST |
HgO |
HgO |
2 |
2 |
Wikipedia |
NIST |
HgS |
HgS |
1 |
|
Wikipedia |
NIST |
HgSO4 |
HgSO4 |
1 |
3 |
Wikipedia |
NIST |
HI |
HI |
12 |
13 |
Wikipedia |
NIST |
HIO |
HOI |
5 |
|
Wikipedia |
NIST |
HIO3 |
HIO3 |
4 |
1 |
Wikipedia |
NIST |
HIO4 |
HIO4 |
2 |
1 |
Wikipedia |
NIST |
His |
 |
1 |
1 |
Wikipedia |
NIST |
Histidine |
 |
1 |
1 |
Wikipedia |
NIST |
Histidine, deprotonated |
 |
|
1 |
Wikipedia |
NIST |
Histidine, doubly-protonated |
 |
1 |
|
Wikipedia |
NIST |
Histidine, protonated |
 |
1 |
1 |
Wikipedia |
NIST |
HMDA |
 |
1 |
1 |
Wikipedia |
NIST |
HMPA |
HMPA |
|
|
Wikipedia |
NIST |
HMPT |
HMPA |
|
|
Wikipedia |
NIST |
HMX |
 |
|
1 |
Wikipedia |
NIST |
HN3 |
HN3 |
2 |
3 |
Wikipedia |
NIST |
HN=C=NH |
HN=C=NH |
2 |
3 |
Wikipedia |
NIST |
HN=NH |
HN=NH |
|
|
Wikipedia |
NIST |
HNa |
NaH |
2 |
7 |
Wikipedia |
NIST |
HNO2 |
HNO2 |
9 |
10 |
Wikipedia |
NIST |
HNO3 |
HNO3 |
6 |
25 |
Wikipedia |
NIST |
HNO3 (5 molar) |
HNO3 5 molar |
1 |
1 |
Wikipedia |
NIST |
HNO3(aq) |
HNO3(aq) |
3 |
3 |
Wikipedia |
NIST |
HNO3(g) |
HNO3(g) |
1 |
1 |
Wikipedia |
NIST |
HNO3, fuming |
HNO3 fuming |
2 |
3 |
Wikipedia |
NIST |
[HN]2- |
[HN]2– |
|
1 |
Wikipedia |
NIST |
Ho |
Ho |
|
|
Wikipedia |
NIST |
HO. |
HO• |
12 |
8 |
Wikipedia |
NIST |
Ho2O3 |
Ho2O3 |
|
|
Wikipedia |
NIST |
HOBr |
HOBr |
4 |
1 |
Wikipedia |
NIST |
HoBr3 |
HoBr3 |
|
|
|
NIST |
HOCH2CH2OH |
 |
6 |
9 |
Wikipedia |
NIST |
HOCl |
HClO |
6 |
4 |
Wikipedia |
NIST |
HoCl3 |
HoCl3 |
|
|
|
NIST |
HOD |
DOH |
1 |
|
|
NIST |
HOF |
HOF |
2 |
1 |
|
NIST |
HoF3 |
HoF3 |
|
|
|
NIST |
HoI3 |
HoI3 |
|
|
|
NIST |
Holmia |
Ho2O3 |
|
|
Wikipedia |
NIST |
Holmium |
Ho |
|
|
Wikipedia |
NIST |
Holmium bromide |
HoBr3 |
|
|
|
NIST |
Holmium chloride |
HoCl3 |
|
|
|
NIST |
Holmium fluoride |
HoF3 |
|
|
|
NIST |
Holmium iodide |
HoI3 |
|
|
|
NIST |
Holmium(III) oxide |
Ho2O3 |
|
|
Wikipedia |
NIST |
Homberg's phosphorus |
CaCl2 |
9 |
|
Wikipedia |
NIST |
Homogeneous mixture (generic) |
|
|
|
Wikipedia |
|
HONC |
H–O=N=C |
1 |
|
Wikipedia |
NIST |
HONO |
HNO2 |
9 |
10 |
Wikipedia |
NIST |
HOO• |
HOO• |
1 |
5 |
|
NIST |
HOOCCOOH |
 |
5 |
2 |
Wikipedia |
NIST |
HOOH |
HOOH |
12 |
30 |
Wikipedia |
NIST |
[HOO]- |
[HOO]– |
|
2 |
|
NIST |
Horn silver |
AgCl |
|
|
Wikipedia |
|
Hornblende |
Ca2(Mg,Fe,Al)5 (Al,Si)8O22(OH)2 |
|
|
Wikipedia |
|
Host (generic) |
 |
|
1 |
|
|
Host-guest complex |
 |
1 |
|
|
|
[HO]+ |
[HO]+ |
|
1 |
|
NIST |
[HO]- |
[OH]– |
25 |
79 |
Wikipedia |
NIST |
[HPO3]2- |
[HPO3]2– |
|
1 |
Wikipedia |
NIST |
[HPO4]2- |
[HPO4]2– |
1 |
2 |
|
NIST |
Hs |
Hs |
|
|
Wikipedia |
NIST |
HS• |
HS• |
|
|
|
NIST |
[HSeO3]- |
[HSeO3]– |
1 |
1 |
|
NIST |
[HSeO4]- |
[HSeO4]– |
|
|
|
NIST |
[HSe]- |
[HSe]– |
|
1 |
|
NIST |
[HSiO3]- |
[HSiO3]– |
|
|
|
NIST |
HSO3Cl |
HSO3Cl |
1 |
2 |
Wikipedia |
NIST |
HSO3F |
HSO3F |
2 |
2 |
Wikipedia |
NIST |
[HSO3]- |
[HSO3]– |
3 |
8 |
|
NIST |
[HSO4]- |
[HSO4]– |
17 |
3 |
|
NIST |
HSSH |
HSSH |
1 |
|
|
NIST |
[HSS]- |
[HSS]– |
1 |
1 |
|
NIST |
[HS]+ |
[HS]+ |
|
|
|
NIST |
[HS]- |
[HS]– |
1 |
8 |
|
NIST |
[HTeO3]- |
[HTeO3]– |
1 |
1 |
|
NIST |
[HTe]- |
[HTe]– |
|
2 |
|
NIST |
Humite series |
Mg(OH,F)2 .1-4Mg2SiO4 |
|
|
Wikipedia |
|
[HXeO4]- |
[HXeO4]– |
1 |
1 |
|
NIST |
Hydracryonitrile |
 |
1 |
3 |
|
NIST |
Hydrargyrum |
Hg |
4 |
1 |
Wikipedia |
NIST |
Hydrated aluminium hydroxide |
Al(H2O)3(OH)3 Al(OH)3 |
4 |
3 |
|
NIST |
Hydrated oxonium ion |
 |
1 |
|
Wikipedia |
NIST |
Hydrazide anion |
[NH2–NH]– |
|
1 |
|
NIST |
Hydrazine |
H2N–NH2 |
5 |
11 |
Wikipedia |
NIST |
Hydrazine, 1° alkyl (generic) |
R–CH2–NNH2 |
1 |
|
Wikipedia |
|
Hydrazine, 2,4-dinitrophenyl |
 |
|
|
Wikipedia |
NIST |
Hydrazine, alkyl (generic) |
R–NHNH2 |
|
|
Wikipedia |
|
Hydrazine, mono-protonated |
[H2N-NH3]+ |
|
|
|
NIST |
Hydrazine, N,N-Dialkyl (generic) |
(R)2N–NH2 |
1 |
|
Wikipedia |
|
Hydrazine, phenyl |
 |
|
1 |
Wikipedia |
NIST |
Hydrazinium ion |
[H2N-NH3]+ |
|
|
|
NIST |
Hydrazoic acid |
HN3 |
2 |
3 |
Wikipedia |
NIST |
Hydrazoic acid anion |
[N3]– |
|
5 |
Wikipedia |
NIST |
Hydrazone (generic) |
RHC=N–NH2 |
1 |
1 |
Wikipedia |
|
Hydride donor Lewis acid reducing agent (generic) |
 |
|
|
|
|
Hydride ion |
H– |
|
36 |
Wikipedia |
NIST |
Hydride ion complex reducing agent (generic) |
 |
|
|
|
|
Hydridocarbide ion |
HC≡C– |
1 |
2 |
Wikipedia |
NIST |
Hydrochloric acid, aqueous |
HCl(aq) |
2 |
13 |
Wikipedia |
NIST |
Hydrochloric acid, concentrated |
HCl(conc) |
2 |
9 |
Wikipedia |
NIST |
Hydrofluoric acid.antimony(V) pentafluoride |
ROH |
2 |
|
Wikipedia |
NIST |
Hydrogen |
H2 |
139 |
158 |
Wikipedia |
NIST |
Hydrogen 1 |
1H |
3 |
7 |
Wikipedia |
|
Hydrogen acetylide anion |
HC≡C– |
1 |
2 |
Wikipedia |
NIST |
Hydrogen arsenate ion |
[HAsO4]2– |
1 |
1 |
|
NIST |
Hydrogen atom |
H• |
20 |
10 |
Wikipedia |
NIST |
Hydrogen azide |
HN3 |
2 |
3 |
Wikipedia |
NIST |
Hydrogen bond complex (generic) |
 |
|
|
Wikipedia |
|
Hydrogen bromide |
HBr |
22 |
20 |
Wikipedia |
NIST |
Hydrogen bromide, 30% solution in acetic acid |
HBr in CH3COOH 30% W/W |
1 |
|
|
NIST |
Hydrogen carbide |
CH4 |
14 |
32 |
Wikipedia |
NIST |
Hydrogen carbide ion |
HC≡C– |
1 |
2 |
Wikipedia |
NIST |
Hydrogen carbonate ion |
[HCO3]– |
4 |
5 |
|
NIST |
Hydrogen carbonyl radical |
 |
5 |
6 |
|
NIST |
Hydrogen chloride |
HCl |
107 |
50 |
Wikipedia |
NIST |
Hydrogen chromate ion |
[HCrO4]– |
|
|
|
NIST |
Hydrogen citrate ion |
 |
1 |
1 |
|
NIST |
Hydrogen cyanamide |
HN=C=NH |
2 |
3 |
Wikipedia |
NIST |
Hydrogen cyanide |
HCN |
5 |
18 |
Wikipedia |
NIST |
Hydrogen delivered equivalents |
[H] |
|
32 |
|
NIST |
Hydrogen deuteride |
HD |
1 |
|
|
NIST |
Hydrogen deuterium oxide |
DOH |
1 |
|
|
NIST |
Hydrogen difluoride ion |
[FHF]– |
3 |
2 |
Wikipedia |
NIST |
Hydrogen disulfide ion |
[HSS]– |
1 |
1 |
|
NIST |
Hydrogen family (generic) |
Group Ia/1 Alkali Metals |
|
|
Wikipedia |
|
Hydrogen fluoride |
HF |
30 |
39 |
Wikipedia |
NIST |
Hydrogen fluoride dimer |
 |
1 |
|
Wikipedia |
NIST |
Hydrogen fluoride hexamer |
(HF)6 |
1 |
|
Wikipedia |
NIST |
Hydrogen fluoride/Fluoride ion Complex |
[FHF]– |
3 |
2 |
Wikipedia |
NIST |
Hydrogen fumarate ion |
 |
1 |
1 |
|
NIST |
Hydrogen hydroxide |
H2O |
529 |
531 |
Wikipedia |
NIST |
Hydrogen iodide |
HI |
12 |
13 |
Wikipedia |
NIST |
Hydrogen ion |
H+ |
77 |
547 |
Wikipedia |
NIST |
Hydrogen malonate ion |
 |
1 |
1 |
|
NIST |
Hydrogen o-phthalate ion |
 |
1 |
1 |
|
NIST |
Hydrogen oxide |
H2O |
529 |
531 |
Wikipedia |
NIST |
Hydrogen peroxide |
HOOH |
12 |
30 |
Wikipedia |
NIST |
Hydrogen peroxide anion |
[HOO]– |
|
2 |
|
NIST |
Hydrogen peroxide radical |
HOO• |
1 |
5 |
|
NIST |
Hydrogen peroxide radical anion |
[H2O2]+• |
1 |
1 |
|
NIST |
Hydrogen phosphate dianion |
[HPO4]2– |
1 |
2 |
|
NIST |
Hydrogen phosphite ion |
[H3PO4]– |
1 |
1 |
|
NIST |
Hydrogen radical |
H• |
20 |
10 |
Wikipedia |
NIST |
Hydrogen removal oxidising agent (generic) |
 |
|
|
|
|
Hydrogen selenate ion |
[HSeO4]– |
|
|
|
NIST |
Hydrogen selenide |
H2Se |
3 |
1 |
Wikipedia |
NIST |
Hydrogen selenide ion |
[HSe]– |
|
1 |
|
NIST |
Hydrogen selenite ion |
[HSeO3]– |
1 |
1 |
|
NIST |
Hydrogen silicate ion |
[HSiO3]– |
|
|
|
NIST |
Hydrogen succinate ion |
 |
1 |
1 |
|
NIST |
Hydrogen sulfate ion |
[HSO4]– |
17 |
3 |
|
NIST |
Hydrogen sulfenium ion |
[HS]+ |
|
|
|
NIST |
Hydrogen sulfide |
H2S |
10 |
22 |
Wikipedia |
NIST |
Hydrogen sulfide anion |
[HS]– |
1 |
8 |
|
NIST |
Hydrogen sulfide, aqueous |
H2S(aq) |
1 |
|
Wikipedia |
NIST |
Hydrogen sulfide radical |
HS• |
|
|
|
NIST |
Hydrogen sulfite ion |
[HSO3]– |
3 |
8 |
|
NIST |
Hydrogen sulphate ion |
[HSO4]– |
17 |
3 |
|
NIST |
Hydrogen sulphide anion |
[HS]– |
1 |
8 |
|
NIST |
Hydrogen sulphide ion |
H2S |
10 |
22 |
Wikipedia |
NIST |
Hydrogen tartrate ion |
 |
1 |
1 |
|
NIST |
Hydrogen telluride |
H2Te |
1 |
2 |
Wikipedia |
NIST |
Hydrogen telluride anion |
[HTe]– |
|
2 |
|
NIST |
Hydrogen tellurite ion |
[HTeO3]– |
1 |
1 |
|
NIST |
Hydrogen, ortho |
↑H–H↑ |
1 |
|
Wikipedia |
NIST |
Hydrogen, para |
↑H–H↓ |
|
|
Wikipedia |
NIST |
Hydrogen, protonated |
[H3]+ |
2 |
3 |
Wikipedia |
NIST |
Hydrogenation reduction system (generic) |
 |
|
|
Wikipedia |
|
Hydrogenic ion |
[H3]+ |
2 |
3 |
Wikipedia |
NIST |
Hydrogenol |
H2O |
529 |
531 |
Wikipedia |
NIST |
Hydrohydroxynitroyl (generic) |
 |
|
|
|
|
Hydron |
H+ |
77 |
547 |
Wikipedia |
NIST |
Hydronitroyl (generic) |
 |
|
|
|
|
Hydronium ion, [H3O]+ |
[H3O]+ |
5 |
5 |
|
NIST |
Hydronium ion, [H3]+ |
[H3]+ |
2 |
3 |
Wikipedia |
NIST |
Hydroperoxy radical |
HOO• |
1 |
5 |
|
NIST |
Hydroquinone |
 |
2 |
|
Wikipedia |
NIST |
Hydroxide ion |
[OH]– |
25 |
79 |
Wikipedia |
NIST |
Hydroxy acid anion (generic) |
X–O– |
|
|
|
|
Hydroxy acid, protonated (generic) |
 |
|
|
|
|
beta-Hydroxy aldehyde (generic) |
 |
2 |
|
|
|
Hydroxy alkoxy carbenium ion (generic) |
 |
1 |
|
|
|
beta-Hydroxy amine (generic) |
 |
1 |
|
|
|
2-Hydroxy benzoic acid |
 |
1 |
2 |
Wikipedia |
NIST |
Hydroxy carbenium ion |
 |
1 |
|
|
NIST |
Hydroxy cation |
[HO]+ |
|
1 |
|
NIST |
beta-Hydroxy ether (generic) |
 |
1 |
|
|
|
Hydroxy radical |
HO• |
12 |
8 |
Wikipedia |
NIST |
2-Hydroxy-2-methylbutane |
 |
1 |
|
|
NIST |
2-Hydroxy-2-methylbutanenitrile |
 |
1 |
1 |
|
NIST |
2-Hydroxy-2-methylpropanenitrile |
 |
1 |
1 |
|
NIST |
2-Hydroxy-3-methylbutane |
 |
|
1 |
|
NIST |
4-Hydroxy-4-methyl-2-pentanone |
 |
1 |
1 |
|
NIST |
Hydroxyacetic acid |
 |
2 |
|
Wikipedia |
NIST |
4-Hydroxyaminobenzene |
 |
1 |
|
Wikipedia |
NIST |
Hydroxyammonium ion |
[H3N-OH]+ |
4 |
|
|
NIST |
4-Hydroxyazobenzene |
 |
1 |
|
|
NIST |
2-Hydroxybenzaldehyde |
 |
|
1 |
Wikipedia |
NIST |
Hydroxybenzene |
 |
8 |
10 |
Wikipedia |
NIST |
3-Hydroxybutanal |
 |
1 |
2 |
|
NIST |
2-Hydroxybutane |
 |
1 |
2 |
Wikipedia |
NIST |
(2S)-2-Hydroxybutanedioic acid |
 |
1 |
1 |
Wikipedia |
NIST |
2-Hydroxybutanedioic acid |
 |
1 |
|
Wikipedia |
NIST |
4-Hydroxybutyric acid gamma lactone |
 |
2 |
3 |
Wikipedia |
NIST |
Hydroxydialkoxy carbenium ion (generic) |
 |
1 |
|
|
|
Hydroxyethanoic acid |
 |
2 |
|
Wikipedia |
NIST |
2-Hydroxyethyl ethanoate |
 |
1 |
1 |
|
NIST |
Hydroxyfumaric acid |
 |
1 |
1 |
Wikipedia |
NIST |
2-Hydroxyisobutylnitrile |
 |
1 |
1 |
|
NIST |
Hydroxyl radical |
HO• |
12 |
8 |
Wikipedia |
NIST |
Hydroxylamine |
H2N–OH |
1 |
7 |
Wikipedia |
NIST |
Hydroxylamine (generic) |
R–NHOH |
|
|
Wikipedia |
|
Hydroxylamine hydrochloride |
 |
1 |
|
Wikipedia |
NIST |
Hydroxylamine, protonated |
[H3N-OH]+ |
4 |
|
|
NIST |
Hydroxymaleic acid |
 |
1 |
1 |
Wikipedia |
NIST |
Hydroxymethyl carbenium ion |
 |
1 |
|
|
NIST |
1-Hydroxynaphthalene |
 |
|
2 |
|
NIST |
Hydroxynitrile (AS/A2 generic) |
 |
2 |
|
Wikipedia |
|
Hydroxynitrile (generic) |
 |
2 |
|
|
|
Hydroxynitrile (generic) |
 |
1 |
|
|
|
3-Hydroxynitrobenzene |
 |
1 |
|
|
NIST |
4-Hydroxynitrobenzene |
 |
1 |
|
Wikipedia |
NIST |
Hydroxynitroyl (generic) |
 |
|
|
|
|
2-Hydroxypentanenitrile |
 |
1 |
|
|
NIST |
4-(1-(4-Hydroxyphenyl)-1-methylethyl)phenol |
 |
1 |
1 |
Wikipedia |
NIST |
N-(-4-hydroxyphenyl)ethanamide |
 |
|
|
Wikipedia |
NIST |
Hydroxyphosphane, alkyl (generic) |
 |
|
|
|
|
Hydroxyphosphane, dialkyl (generic) |
 |
|
|
|
|
2-Hydroxypropane |
 |
9 |
8 |
Wikipedia |
NIST |
3-Hydroxypropanenitrile |
 |
1 |
3 |
|
NIST |
(2R)-2-Hydroxy propanoate ion |
 |
2 |
|
|
NIST |
3-Hydroxypropionitrile |
 |
1 |
3 |
|
NIST |
(2S)-Hydroxysuccinic acid |
 |
1 |
1 |
Wikipedia |
NIST |
D/L Hydroxysuccinic acid |
 |
1 |
|
Wikipedia |
NIST |
beta-Hydroxythioether (generic) |
 |
1 |
|
|
|
Hypersthene |
(Mg,Fe)SiO3 |
|
|
Wikipedia |
|
Hypnotic (generic) |
Hypnotic |
|
|
Wikipedia |
|
Hypo |
Na2S2O3 |
5 |
4 |
Wikipedia |
NIST |
Hypobromite ion |
[BrO]– |
1 |
2 |
|
NIST |
Hypobromous acid |
HOBr |
4 |
1 |
Wikipedia |
NIST |
Hypochlorite ion |
[ClO]– |
2 |
5 |
Wikipedia |
NIST |
Hypochlorous acid |
HClO |
6 |
4 |
Wikipedia |
NIST |
Hypochlorous anhydride |
Cl2O |
1 |
3 |
Wikipedia |
NIST |
Hypoflourite ion |
[FO]– |
|
1 |
|
NIST |
Hypofluouous acid |
HOF |
2 |
1 |
|
NIST |
Hypoiodite ion |
[IO]– |
1 |
3 |
|
NIST |
Hypoiodous acid |
HOI |
5 |
|
Wikipedia |
NIST |
Hyponitrite ion |
[N2O2]2– |
|
|
|
NIST |
Hypophosphite ion |
[H2PO2]– |
2 |
1 |
|
NIST |
Hypophosphoric acid |
 |
|
1 |
|
NIST |
Hypophosphorous acid |
H3PO2 |
2 |
2 |
Wikipedia |
NIST |
Hyriodic acid |
HI |
12 |
13 |
Wikipedia |
NIST |
© Mark R. Leach 1999 –