Find A Chemical Entity
Click: A, B, C, etc... for an alphabetical listing of entities
Periodic Table for chemical entities
containing the selected element
Sorts & Finds for predefined selections
| Entity Names Starting With The Letter R |
Structure |
Reactions
Forming |
Reactions
Using |
Wikipedia |
NIST |
| R (arginine) |
![](http://www.chemthes.com/icon_5/1682.png") |
1 |
1 |
Wikipedia |
NIST |
| R• |
R• |
|
2 |
Wikipedia |
|
| R- |
R– |
2 |
13 |
Wikipedia |
|
| R-S-CH2CH2Cl |
R–S–CH2CH2Cl |
1 |
|
|
|
| R2NH |
R2NH |
1 |
3 |
|
|
| [R2N]- |
![](http://www.chemthes.com/icon_5/87.png") |
|
3 |
|
|
| R2O |
![](http://www.chemthes.com/icon_5/252.png") |
2 |
2 |
Wikipedia |
|
| R2S |
R2S |
2 |
5 |
|
|
| R3CO- |
![](http://www.chemthes.com/icon_5/771.png") |
2 |
1 |
|
|
| [R3C]+ |
[R3C]+ |
|
3 |
|
|
| [R3C]- |
[R3C]– |
|
1 |
Wikipedia |
|
| R3N |
R3N |
1 |
3 |
|
|
| Ra |
Ra |
|
|
Wikipedia |
NIST |
| Radical (AS/A2 generic) |
![](http://www.chemthes.com/icon_5/3948.png") |
|
|
Wikipedia |
|
| Radical (generic) |
R• |
|
2 |
Wikipedia |
|
| Radical, allyl |
![](http://www.chemthes.com/icon_5/2057.png") |
|
|
|
NIST |
| Radical, pentadienyl |
![](http://www.chemthes.com/icon_5/2058.png") |
|
|
|
NIST |
| Radioactive material (generic) |
![](http://www.chemthes.com/icon_5/2745.png") |
|
|
Wikipedia |
|
| Radium |
Ra |
|
|
Wikipedia |
NIST |
| Radium 223 |
223Ra |
2 |
1 |
Wikipedia |
NIST |
| Radium 224 |
224Ra |
1 |
1 |
Wikipedia |
NIST |
| Radium 225 |
225Ra |
1 |
1 |
Wikipedia |
NIST |
| Radium 226 |
226Ra |
1 |
1 |
Wikipedia |
NIST |
| Radium 228 |
228Ra |
1 |
1 |
Wikipedia |
NIST |
| Radon |
Rn |
|
1 |
Wikipedia |
NIST |
| Radon 219 |
219Rn |
1 |
1 |
Wikipedia |
NIST |
| Radon 220 |
220Rn |
1 |
1 |
Wikipedia |
NIST |
| Radon 222 |
222Rn |
1 |
1 |
Wikipedia |
NIST |
| Radon difluoride |
RnF2 |
1 |
|
Wikipedia |
NIST |
| Raney nickel |
Ni/H2
Raney Nickel |
|
5 |
Wikipedia |
NIST |
| Rb |
Rb |
1 |
20 |
Wikipedia |
NIST |
| Rb+ |
Rb+ |
5 |
20 |
|
NIST |
| Rb2C2 |
RbC≡CRb |
2 |
|
|
NIST |
| Rb2O |
Rb2O |
2 |
1 |
Wikipedia |
NIST |
| Rb2O2 |
Rb2O2 |
2 |
|
|
NIST |
| Rb2S |
Rb2S |
2 |
1 |
|
NIST |
| Rb2Se |
Rb2Se |
2 |
|
|
NIST |
| Rb2Te |
Rb2Te |
2 |
|
|
NIST |
| Rb3As |
Rb3As |
2 |
1 |
|
NIST |
| Rb3P |
Rb3P |
2 |
|
|
NIST |
| Rb3Sb |
Rb3Sb |
2 |
1 |
|
NIST |
| RbBr |
RbBr |
2 |
|
Wikipedia |
NIST |
| RbCl |
RbCl |
2 |
|
Wikipedia |
NIST |
| RbF |
RbF |
2 |
1 |
Wikipedia |
NIST |
| RbH |
RbH |
2 |
1 |
Wikipedia |
NIST |
| RbI |
RbI |
2 |
|
Wikipedia |
NIST |
| RbNH2 |
RbNH2 |
2 |
|
|
NIST |
| RbO2 |
RbO2 |
2 |
|
|
NIST |
| RbOH |
RbOH |
7 |
2 |
Wikipedia |
NIST |
| RBr |
RBr |
5 |
8 |
Wikipedia |
|
| RbSH |
RbSH |
3 |
|
|
NIST |
| [RCC]- |
R–C≡C– |
1 |
2 |
Wikipedia |
|
| RCF3 |
R–CF3 |
1 |
|
Wikipedia |
|
| RCH2OH |
RCH2OH |
15 |
3 |
|
|
| RCHO |
RCHO |
11 |
21 |
Wikipedia |
|
| RCl |
RCl |
4 |
7 |
Wikipedia |
|
| RCN |
R–CN |
5 |
11 |
|
|
| RCOCl |
RCOCl |
6 |
17 |
|
|
| RCOOH |
RCOOH |
15 |
14 |
|
|
| RCOOR |
![](http://www.chemthes.com/icon_5/672.png") |
7 |
11 |
Wikipedia |
|
| [RCOO]- |
RCOO– |
9 |
11 |
Wikipedia |
|
| RCOSH |
![](http://www.chemthes.com/icon_5/1995.png") |
1 |
|
|
|
| [RCO]+ |
[RCO]+ |
1 |
15 |
|
|
| RCSSH |
![](http://www.chemthes.com/icon_5/1997.png") |
|
|
|
|
| RDX |
![](http://www.chemthes.com/icon_5/3617.png") |
1 |
3 |
Wikipedia |
NIST |
| Re |
Re |
|
|
Wikipedia |
NIST |
| Re2O7 |
Re2O7 |
|
|
Wikipedia |
NIST |
| Re3Br9 |
ReBr3
Re3Br9 |
|
|
|
NIST |
| Re3Cl9 |
ReCl3
Re3Cl9 |
|
|
|
NIST |
| Re3I9 |
ReI3
Re3I9 |
|
|
|
NIST |
| Re7+ |
Re7+ |
|
1 |
|
NIST |
| Realgar |
As4S4 |
|
|
Wikipedia |
|
| ReBr4 |
ReBr4 |
|
|
|
NIST |
| ReBr5 |
ReBr5 |
|
|
|
NIST |
| ReCl4 |
ReCl4 |
|
|
|
NIST |
| ReCl5 |
ReCl5 |
|
|
|
NIST |
| Red brass |
Commercial
Bronze |
|
|
Wikipedia |
NIST |
| Red copper ore |
Cu2O |
|
1 |
Wikipedia |
|
| Red lead |
Pb3O4 |
|
|
Wikipedia |
NIST |
| Red phosphorus |
P
Red |
1 |
1 |
Wikipedia |
NIST |
| Reducing agent (AS/A2 generic) |
![](http://www.chemthes.com/icon_5/3968.png") |
|
|
Wikipedia |
|
| ReF4 |
ReF4 |
|
|
|
NIST |
| ReF6 |
ReF6 |
|
|
|
NIST |
| ReF7 |
ReF7 |
|
|
|
NIST |
| Refinary gas |
Natural
Gas |
1 |
5 |
Wikipedia |
NIST |
| [ReH9]2- |
[ReH9]2– |
1 |
1 |
|
NIST |
| ReI4 |
ReI4 |
|
|
|
NIST |
| ReI5 |
ReF5 |
|
|
|
NIST |
| ReO2 |
ReO2 |
|
|
|
NIST |
| ReO3 |
ReO3 |
|
|
|
NIST |
| 11-cis-Retinal |
11-cis-Retinal |
1 |
|
Wikipedia |
NIST |
| trans-Retinal |
trans-Retinal |
1 |
1 |
Wikipedia |
NIST |
| Retinol |
Retinol
Vitamin A |
|
1 |
Wikipedia |
NIST |
| Reychlers acid |
![](http://www.chemthes.com/icon_5/1902.png") |
1 |
1 |
|
NIST |
| RF |
R–F |
2 |
1 |
Wikipedia |
|
| Rf |
Rf |
|
|
Wikipedia |
NIST |
| Rg |
Rg |
|
|
Wikipedia |
NIST |
| Rh |
![](http://www.chemthes.com/icon_5/1193.png") |
|
1 |
Wikipedia |
NIST |
| Rh on C |
Rh
on Carbon |
|
8 |
|
NIST |
| Rh+ |
Rh+ |
|
2 |
|
NIST |
| Rhenic anhydride |
ReO3 |
|
|
|
NIST |
| Rhenium |
Re |
|
|
Wikipedia |
NIST |
| Rhenium nonahydride ion |
[ReH9]2– |
1 |
1 |
|
NIST |
| Rhenium(III) bromide |
ReBr3
Re3Br9 |
|
|
|
NIST |
| Rhenium(III) chloride |
ReCl3
Re3Cl9 |
|
|
|
NIST |
| Rhenium(III) iodide |
ReI3
Re3I9 |
|
|
|
NIST |
| Rhenium(IV) bromide |
ReBr4 |
|
|
|
NIST |
| Rhenium(IV) chloride |
ReCl4 |
|
|
|
NIST |
| Rhenium(IV) fluoride |
ReF4 |
|
|
|
NIST |
| Rhenium(IV) iodide |
ReI4 |
|
|
|
NIST |
| Rhenium(IV) oxide |
ReO2 |
|
|
|
NIST |
| Rhenium(V) bromide |
ReBr5 |
|
|
|
NIST |
| Rhenium(V) chloride |
ReCl5 |
|
|
|
NIST |
| Rhenium(V) fluoride |
ReF5 |
|
|
|
NIST |
| Rhenium(VI) fluoride |
ReF6 |
|
|
|
NIST |
| Rhenium(VI) oxide |
ReO3 |
|
|
|
NIST |
| Rhenium(VII) fluoride |
ReF7 |
|
|
|
NIST |
| Rhenium(VII) ion |
Re7+ |
|
1 |
|
NIST |
| Rhenium(VII) oxide |
Re2O7 |
|
|
Wikipedia |
NIST |
| Rhine metal |
Rhine
Metal |
|
|
|
NIST |
| Rho |
ρ+ |
1 |
|
Wikipedia |
|
| Rhodanate, methyl |
N≡C–S–CH3 |
1 |
|
|
NIST |
| Rhodium |
|
|
1 |
Wikipedia |
NIST |
| Rhodium on carbon |
Rh
on Carbon |
|
8 |
|
NIST |
| Rhodium(I) ion |
Rh+ |
|
2 |
|
NIST |
| Rhodochrosite |
MnCO3 |
|
1 |
Wikipedia |
|
| Rhodonite |
(Mn2+,Fe22+,
Mg,Ca)SiO3 |
|
|
Wikipedia |
|
| Rhombic sulfur |
S8 |
3 |
1 |
Wikipedia |
NIST |
| RI |
R–I |
3 |
7 |
Wikipedia |
|
| D-Ribose |
![](http://www.chemthes.com/icon_5/3729.png") |
1 |
1 |
Wikipedia |
NIST |
| D-Ribulose |
![](http://www.chemthes.com/icon_5/3745.png") |
|
|
Wikipedia |
NIST |
| Riebeckite |
Na2(Fe2+3Fe3+2)
Si8O22(OH)2 |
|
|
Wikipedia |
|
| RLi |
RLi |
2 |
4 |
|
|
| RMgBr |
RMgBr |
2 |
1 |
Wikipedia |
|
| RMgCl |
RMgCl |
2 |
1 |
Wikipedia |
|
| RMgX |
RMgX |
1 |
12 |
Wikipedia |
|
| Rn |
Rn |
|
1 |
Wikipedia |
NIST |
| RN3 |
R–N3 |
1 |
|
Wikipedia |
|
| RN=NR |
R–N=N–R' |
|
|
Wikipedia |
|
| RNC |
R–NC |
3 |
|
Wikipedia |
|
| RNCO |
R–N=C=O |
3 |
|
Wikipedia |
|
| RNCS |
R–N=C=S |
2 |
|
Wikipedia |
|
| RnF2 |
RnF2 |
1 |
|
Wikipedia |
NIST |
| RNH2 |
R–NH2 |
4 |
9 |
|
|
| RNHNH2 |
R–NHNH2 |
|
|
Wikipedia |
|
| RNO |
R–N=O |
|
|
Wikipedia |
|
| RO- |
RO– |
1 |
8 |
Wikipedia |
|
| Roberts-Austen alloy |
Purple
Gold |
|
|
|
NIST |
| Rochelle salt |
KNa Tartrate
.4H2O |
|
1 |
Wikipedia |
NIST |
| Rock fiber |
Rock Fiber |
|
|
Wikipedia |
|
| Rock wool |
Rock Fiber |
|
|
Wikipedia |
|
| ROCN |
R–O–C≡N |
2 |
|
Wikipedia |
|
| Roentgenium |
Rg |
|
|
Wikipedia |
NIST |
| ROH |
R–OH |
18 |
13 |
Wikipedia |
|
| RONC |
R–O–N=C |
|
|
Wikipedia |
|
| Rose metal |
Rose
Metal |
|
|
Wikipedia |
NIST |
| Rose's alloy |
Rose
Metal |
|
|
Wikipedia |
NIST |
| [RO]+ |
[R–O]+ |
|
|
|
|
| RSCN |
R–S–C≡N |
2 |
|
Wikipedia |
|
| RSeCN |
R–Se–C≡N |
|
|
|
|
| RSeNC |
R–Se–N=C |
|
|
|
|
| [RSe]- |
[R–Se]– |
|
1 |
|
|
| RSH |
R–SH |
2 |
2 |
|
|
| RSO2Cl |
RSO2Cl |
4 |
1 |
|
|
| RSR |
R2S |
2 |
5 |
|
|
| RSSR |
R–S–S–R |
4 |
|
|
|
| [RS]+ |
[R–S]+ |
|
2 |
|
|
| [RS]- |
[R–S]– |
|
7 |
|
|
| Ru |
Ru |
|
|
Wikipedia |
NIST |
| Ru on C |
Ru
on carbon |
|
4 |
Wikipedia |
NIST |
| Ru2+ |
Ru2+ |
|
|
|
NIST |
| Rubber, butyl |
Butyl
Rubber |
1 |
1 |
Wikipedia |
NIST |
| Rubber, natural |
![](http://www.chemthes.com/icon_5/3644.png") |
|
|
Wikipedia |
|
| Rubber, nitrile |
Nitrile
Rubber |
1 |
|
Wikipedia |
NIST |
| Rubber, polybutadiene |
Polybutadiene
Rubber |
1 |
|
Wikipedia |
NIST |
| Rubber, styrene butadiene |
Styrene-Butadiene
Rubber |
1 |
|
Wikipedia |
NIST |
| Rubber, synthetic |
![](http://www.chemthes.com/icon_5/2601.png") |
1 |
|
Wikipedia |
NIST |
| Rubbing alcohol |
![](http://www.chemthes.com/icon_5/625.png") |
9 |
8 |
Wikipedia |
NIST |
| Rubidium |
Rb |
1 |
20 |
Wikipedia |
NIST |
| Rubidium amide |
RbNH2 |
2 |
|
|
NIST |
| Rubidium antimonide |
Rb3Sb |
2 |
1 |
|
NIST |
| Rubidium arsenide |
Rb3As |
2 |
1 |
|
NIST |
| Rubidium bromide |
RbBr |
2 |
|
Wikipedia |
NIST |
| Rubidium carbide |
RbC≡CRb |
2 |
|
|
NIST |
| Rubidium cation |
Rb+ |
5 |
20 |
|
NIST |
| Rubidium chloride |
RbCl |
2 |
|
Wikipedia |
NIST |
| Rubidium fluoride |
RbF |
2 |
1 |
Wikipedia |
NIST |
| Rubidium graphite |
C8Rb |
1 |
|
Wikipedia |
NIST |
| Rubidium hydride |
RbH |
2 |
1 |
Wikipedia |
NIST |
| Rubidium hydrogen sulfide |
RbSH |
3 |
|
|
NIST |
| Rubidium hydroxide |
RbOH |
7 |
2 |
Wikipedia |
NIST |
| Rubidium iodide |
RbI |
2 |
|
Wikipedia |
NIST |
| Rubidium oxide |
Rb2O |
2 |
1 |
Wikipedia |
NIST |
| Rubidium peroxide |
Rb2O2 |
2 |
|
|
NIST |
| Rubidium phosphide |
Rb3P |
2 |
|
|
NIST |
| Rubidium selenide |
Rb2Se |
2 |
|
|
NIST |
| Rubidium stibnide |
Rb3Sb |
2 |
1 |
|
NIST |
| Rubidium sulfide |
Rb2S |
2 |
1 |
|
NIST |
| Rubidium superoxide |
RbO2 |
2 |
|
|
NIST |
| Rubidium telluride |
Rb2Te |
2 |
|
|
NIST |
| RuBr3 |
RuBr3 |
|
|
|
NIST |
| Ruby |
Al2O3 |
|
|
Wikipedia |
|
| RuCl3 |
RuCl3 |
|
|
Wikipedia |
NIST |
| RuCl4 |
RuCl4 |
|
|
|
NIST |
| RuF3 |
RuF3 |
|
|
|
NIST |
| RuF4 |
RuF4 |
|
|
|
NIST |
| RuF5 |
RuF5
[RuF5]4 |
|
|
|
NIST |
| RuF6 |
RuF6 |
|
|
|
NIST |
| RuI3 |
RuI3 |
|
|
|
NIST |
| RuO2 |
RuO2 |
|
|
Wikipedia |
NIST |
| RuO4 |
RuO4 |
|
|
Wikipedia |
NIST |
| Ruthenium |
Ru |
|
|
Wikipedia |
NIST |
| Ruthenium on carbon |
Ru
on carbon |
|
4 |
Wikipedia |
NIST |
| Ruthenium tetroxide |
RuO4 |
|
|
Wikipedia |
NIST |
| Ruthenium(II) ion |
Ru2+ |
|
|
|
NIST |
| Ruthenium(III) bromide |
RuBr3 |
|
|
|
NIST |
| Ruthenium(III) chloride |
RuCl3 |
|
|
Wikipedia |
NIST |
| Ruthenium(III) fluoride |
RuF3 |
|
|
|
NIST |
| Ruthenium(III) iodide |
RuI3 |
|
|
|
NIST |
| Ruthenium(IV) chloride |
RuCl4 |
|
|
|
NIST |
| Ruthenium(IV) fluoride |
RuF4 |
|
|
|
NIST |
| Ruthenium(IV) oxide |
RuO2 |
|
|
Wikipedia |
NIST |
| Ruthenium(V) fluoride |
RuF5
[RuF5]4 |
|
|
|
NIST |
| Ruthenium(VI) fluoride |
RuF6 |
|
|
|
NIST |
| Ruthenium(VIII) oxide |
RuO4 |
|
|
Wikipedia |
NIST |
| Rutherfordium |
Rf |
|
|
Wikipedia |
NIST |
| Rutile |
TiO2 |
|
1 |
Wikipedia |
|
| Redox agent: per-oxygen oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1350.png") |
|
|
|
|
| Redox agent: oxidised heavy metal oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1351.png") |
|
|
|
|
| Redox agent: oxidised main group element oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1352.png") |
|
|
|
|
| Redox agent: SET oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1353.png") |
|
|
|
|
| Redox agent: hydrogen removal oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1354.png") |
|
|
|
|
| Redox agent: miscellaneous oxidising agent (generic) |
![](http://www.chemthes.com/icon_5/1355.png") |
|
|
|
|
| Redox agent: hydrogenation reduction (generic) |
![](http://www.chemthes.com/icon_5/1356.png") |
|
|
Wikipedia |
|
| Redox agent: hydride donor Lewis acid reducing agent (generic) |
![](http://www.chemthes.com/icon_5/1358.png") |
|
|
|
|
| Redox agent: hydride ion complex reducing agent (generic) |
![](http://www.chemthes.com/icon_5/1357.png") |
|
|
|
|
| Redox agent: dissolved metal reducing agent (generic) |
![](http://www.chemthes.com/icon_5/1359.png") |
|
|
Wikipedia |
|
| Redox agent: single electron transfer donor reducing agent (generic) |
![](http://www.chemthes.com/icon_5/1360.png") |
|
|
|
|
| Redox agent: miscellaneous reducing agent (generic) |
![](http://www.chemthes.com/icon_5/1361.png") |
|
|
|
|
© Mark R. Leach 1999 –
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please contact Mark R. Leach, the author, using mark@meta-synthesis.com