TY - JOUR
T1 - Towards the formation of dimeric and trimeric lithium benzamidinates
T2 - Characterization of intermediate structures
AU - Lisovskii, A.
AU - Botoshansky, M.
AU - Eisen, M. S.
PY - 2001
Y1 - 2001
N2 - p-Toluonitrile reacts with LiN(TMS)2 in diethyl ether (1 : 1) to yield a dimeric complex 1 containing a lithium benzamidinate unit, a molecule of p-toluonitrile attached to the lithium atom and a molecule of lithium bis(trimethylsilyl)amide coordinated to a lithium-nitrogen bond, of the benzamidinate unit, forming a four-membered ring. The crystal structure of 1 shows the molecularity, the stereochemistry and the manner of activation of nitriles by lithium amido salts in the formation of amidinates. When the same reaction is carried out in hexane, the trimeric complex 2 is formed, containing lithium atoms simultaneously π- and σ-bonded to amidine moieties. When the ratio of p-toluonitrile and LiN(TMS)2 in diethyl ether-hexane is 2 : 1, complex 1 is obtained, which can be treated with two equivalents of LiN(TMS)2 to produce 3.
AB - p-Toluonitrile reacts with LiN(TMS)2 in diethyl ether (1 : 1) to yield a dimeric complex 1 containing a lithium benzamidinate unit, a molecule of p-toluonitrile attached to the lithium atom and a molecule of lithium bis(trimethylsilyl)amide coordinated to a lithium-nitrogen bond, of the benzamidinate unit, forming a four-membered ring. The crystal structure of 1 shows the molecularity, the stereochemistry and the manner of activation of nitriles by lithium amido salts in the formation of amidinates. When the same reaction is carried out in hexane, the trimeric complex 2 is formed, containing lithium atoms simultaneously π- and σ-bonded to amidine moieties. When the ratio of p-toluonitrile and LiN(TMS)2 in diethyl ether-hexane is 2 : 1, complex 1 is obtained, which can be treated with two equivalents of LiN(TMS)2 to produce 3.
UR - http://www.scopus.com/inward/record.url?scp=0034742986&partnerID=8YFLogxK
U2 - 10.1039/b100251l
DO - 10.1039/b100251l
M3 - 文章
AN - SCOPUS:0034742986
SN - 1470-479X
SP - 1692
EP - 1698
JO - Journal of the Chemical Society. Dalton Transactions
JF - Journal of the Chemical Society. Dalton Transactions
IS - 11
ER -