Dilithiation of N,N′-diphenylthiourea, PhNHC(S)NHPh, in HMPA: the unexpected structure of the product, [PhNPh)SLi·2HMPA]2, and supporting ab initio MO calculations on model systems
摘要：
Ab initio calculations on mono- and di-lithiated derivatives of thiourea predict that Li atom(s) will bridge N and S centres, leading to lengthening of the bond and shortening of one or both of the bonds in thiourea. The synthesised complex of dilithiated diphenylthiourea, [PhN LiC(NPh)SLi·2HMPA] 2 ( 1) displays many of the structural features suggested by theory, having been shown by X-ray crystallography to contain monomeric units with SLi and N(μ 2Li)N bonds, these monomers then being linked by N: → Li coordinations.
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DOI：
10.1016/0022-328X(89)85298-2
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年份：
1989
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1997
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