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Names | |
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IUPAC name
(2R)-2-Amino-3-tellanylpropanoic acid
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Other names
Tellurocystine
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
PubChem CID
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Properties | |
C3H7NO2Te | |
Molar mass | 216.69 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tellurocysteine (in some publications referred to as Te-Cys) is an amino acid with the formula HTeCH2CH(NH2)CO2H. It is the heavy analogue of serine, cysteine, and selenocysteine. Tellurol (RTeH) is a rare and fragile functional group, especially alkyl derivatives. The C-Te bond (200 kJ/mol) is weak compared to 234 kJ/mol for the C-Se bond.[1] These factors combine to make tellurocysteine very labile. Even selenocysteine occurs only rarely in nature.[2] Instead of tellurocysteine, tellurocystine is generally isolated instead. Tellurocystine has the formula (TeCH2CH(NH2)CO2H)2, with a central Te-Te bond.[3]
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