Methyl-Lithium

CAS number : 917-54-4

Molecular weight :21.98

Molecular formula/chemical symbol :CH3Li

Description :

Two structures have been verified by single crystal X-ray crystallography as well as by ⁶Li, ⁷Li, and ¹³C NMR spectroscopy. The tetrameric cluster consists of a distorted cubane, with carbon and lithium atoms at alternate corners. The Li---Li distances are 2.68 ?, almost identical with the Li-Li bond in gaseous dilithium. The C-Li distances are 2.31 ?. Carbon is bonded to three hydrogen atoms and three Li atoms. The nonvolatility of (MeLi)₄ and its insolubility in alkanes results from the fact that the clusters interact via further inter-cluster agostic interactions. In contrast the bulkier cluster (tertiary-butylLi)₄, where intercluster interactions are precluded by steric effects, is volatile as well as soluble in alkanes.

Methyllithium
IUPAC name[hide] Methyllithium
Other names[hide] Lithium methanide
Identifiers
CAS number	917-54-4 Y
PubChem	2724049
ChemSpider	10254338 Y
EC number	213-026-4
ChEBI	CHEBI:51486 Y
Beilstein Reference	3587162
Gmelin Reference	288
Jmol-3D images	Image 1
Properties
Molecular formula	CH3Li
Molar mass	21.98 g mol?1
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa

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