Synthesis and structures of halides and pseudohalides of bis[2,6-bis(dimethylamino)phenyl]tin(IV).
Oxidative addition reactions of Sn{C6H3(NMe2)(2)-2,6}2 [ identical with Sn(ArN2)2] () with XeF2, HgCl2 or TeCl4, dabco.2Br2, I2, or SiMe3N3 afforded [Sn(ArN2)2F2] (), [Sn(ArN2)2Cl2] (), [Sn(ArN2)2Br2] (), [Sn(ArN2)2I2] (), or [Sn(ArN2)2{N(SiMe3)2}N3] (), respectively. Compound was also obtained from and aqueous KF. Treatment of , under phase transfer conditions using [NBnEt3]Cl in H2O, with NaN3, KOCN, or KSCN yielded [Sn(ArN2)2(N3)2] (), [Sn(ArN2)2(NCO)2] (), or [Sn(ArN2)2(NCS)2] (), respectively. Alternative pathways to are suggested. Excellent (, and ) and satisfactory () yields were recorded; each compound was characterised by C, H, N microanalysis, mass spectra and multinuclear NMR solution spectra at ambient temperature, which invariably showed equivalent NMe2(1)H and 13C signals for the two NMe2 groups. The X-ray structures of crystalline [Sn(ArN2)Cl] (), , , , and showed that only one of the 2- and 6-Me2N substituents of an (ArN2) group was in a close SnN contact. Reaction of with Li[AlMe4] or LiMe gave [Sn(ArN2)(micro-Me)2AlMe2] () or c-(SnMe2)6, respectively.
Hitchcock
Peter B
PB
Department of Chemistry, University of Sussex, Brighton, UK BN1 9QJ.
Lappert
Michael F
MF
Protchenko
Andrey V
AV
Uiterweerd
Patrick G H
PG