ARMSTRONG, D R and BARR, D and SNAITH, R and CLEGG, W and Mulvey, Robert and WADE, K and REED, D (1987) The ring-stacking principle in organolithium chemistry: its development through the isolation and crystal structures of hexameric iminolithium clusters (RR'C=NLi)6 (R'=Ph, R=But or Me2N; R=R'=Me2N or But). Journal of the Chemical Society, Dalton Transactions (5). pp. 1071-1081. ISSN 0300-9246Full text not available in this repository. (Request a copy from the Strathclyde author)
Synthetic and X-ray crystallographic studies on two new iminolithium compounds, [But(Ph)CNLi]6(1) and [Me2N(Ph)CNLi]6(2), have revealed, in conjunction with previously reported work on [(Me2N)2CNLi]6(3) and (But2CNLi)6(4), a family of hexameric iminolithium species. All four compounds have remarkably similar solid-state structures based on slightly folded chair-shaped Li6 cores, the six smaller (isosceles) Li3 triangular faces of which are bridged by three-electron imino ligands through electron-deficient bonds. The precise determination of the structures of (1) and (2) has revealed features which were not apparent in the earlier limited and less fully refined structural studies on (3) and (4). Recognition of such features and their detailed analysis leads to a ring-stacking principle which envisages the formation of these hexameric structures from two slightly puckered trimeric rings, (RR′CNLi)3, brought together in a staggered arrangement. Extension of this principle allows the rationalisation of many other structures in lithium chemistry and facilitates structural predictions.
|Keywords:||inorganic compounds, crystalline structures, Chemistry|
|Subjects:||Science > Chemistry|
|Department:||Faculty of Science > Pure and Applied Chemistry|
|Depositing user:||Pure Administrator|
|Date Deposited:||08 Feb 2012 14:59|
|Last modified:||16 Sep 2016 02:25|