ISSN:
0009-2940
Keywords:
Lithium hydrazide, N-phenyl-N,N′-bis(trimethylsilyl)-
;
Lithium hydrazide, N,N′-diphenyl-N′-(trimethylsilyl)-
;
Sodium hydrazide, N,N′-diphenyl-N-(trimethylsilyl)-
;
Caesium hydrazide, N-phenyl-N′,N′-bis(trimethylsilyl)-
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The crystal and molecular structures of a series of N-phenyl-substituted lithium hydrazides were determined in order to investigate possible Li···Ph π interactions. These are pronounced when there are no donor molecules present to solvate the Li centers. An η6-Li···Ph interaction is particularly distinct in tetrameric (Me3Si)2N-N(Ph)Li but also in trimeric Ph2N-N(SiMe3)Li Deprotonation of N,N′ -diphenylhydrazine with butyllithium in ether resulted in the formation of Ph(Li)N-N(Ph)Li · 2 LiNPh2 · 2 OEt2 with phenyl group migration and N-N bond cleavage by a redox process. An increase of the size of the cations, as shown for Ph(Me3-Si)N-N(Ph)Na · NH3 and the caesium salt (Me3-Si)2N-N(Ph)Cs · nTHF, results in increased coordination of the metal ion to the phenyl group. The caesium compound forms a three-dimensional network. Channels along the c axis are partially filled with THF molecules.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19961291105
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