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Contributions to the Chemistry of Boron, 231. Synthesis and Structures of Borylated Hydrazines
Hommer, Herbert,Noeth, Heinrich,Sachdev, Hermann,Schmidt, Martin,Schwenk, Holger
, p. 1187 - 1194 (2007/10/03)
The diboration of the diazene PhN=NSiMe3 (15) by diborane(4) derivatives provides a new synthetic route to N,N'-diborylated hydrazines.The product formed depends on the type of the diborane(4) compound.Thus, addition of dimesityldiboron dichloride to 15 in a 1:1 ratio afforded (mesCIB)PhN-N(SiMe3)(BClmes) (16) while bis(dimethylamino)diboron dichloride was found to react in a 1:2 ratio to give a triazadiborolidine derivative 17.In addition, it was demonstrated that in the solid state Me2N-N(BPh2)2 (8) is a derivative of a three-membered dihydroazadiboriridine C while its isomer, (Ph2B)MeN-NMe(BPh2) (7), forms no BN coordinative bond.The new 3,6-difluoro-1,2,4,5-tetraza-3,6-diborine 13 shows a twist conformation.The molecular structures of all these compounds were determined by X-ray crystal structure analysis, and the influence of the B substituent on the conformation is discussed. - Keywords: Hydrazines, N,N'-bis(diphenylboryl)-N,N'-dimethyl-, N,N-bis(diphenylboryl)-N',N'-dimethyl-, N,N'-bis(dimethylphenylsilyl)-, N,N'-bis(chloromesitylboryl)-N-phenyl-N'-(trimethylsilyl)- ; 1,2,4,5,3,6-Tetrazadiborinane, 1,2,4,5-tetrakis(tert-butyldimethylsilyl)-3,6-difluoro- ; Triazadiborolidine, dihydro-, derivative
