Syntheses, Structures And Characterizations Of Heterobimetallic Organotin Coordination Compounds

In this paper, seven novel heterobimetallic organotin coordination complexes, which havenever been reported previously, were synthesized. The structures of all these compounds havebeen established by single-crystal X-ray diffraction analyses. This article represents asystematical examination of the structures of the organotin-cyanometalate based ontriorganotin, diorganotin and organooxotin cluster. In order to survey the influence of thenumber of CN groups on the structures of organotin-cyanometalate, nitroprusside[Na₂Fe(CN)₅NO·2H₂O] containing five CN-groups was selected for study, and six novelorganotin-cyanometalate have been synthesized: [Ph3Sn]2[Fe(CN)5NO] (1)[Bz₃Sn]₂[Fe(CN)₅NO] (Bz = C₆H₅CH₂-) (2), [Bz₂Sn][Fe(CN)₅NO] (3),[(Bz₃Sn)₂CN]₂[Fe(CN)₅NO] (4), [Bz₂SnOSn(MeO)Bz₂]₂[Fe(CN)₅NO]·3CH₂Cl₂ (5) and[Bz₂SnOSn(EtO)Bz₂]2[Fe(CN)₅NO]·3CH₂Cl₂ (6). Compounds (1)-(4) exhibit infinite 2D (4, 4)networks containing rectangular grids, while compounds (5) and (6) show a one-dimensionalpolymeric chain. The Lewis acid character of organotin can contribute to form adductions.Therefore, neutral coordination compounds are selected to react with organotin.[Ph₃SnClCr(L)₃]·[Ph3SnClMeOH] (7) (L=6-methylpyridine-2-carboxylate) is isolated in thesereactions. Compound 7 possesses discrete structure. In addition, compounds (1)-(7) are alsocharacterized by IR and elemental analyses.