Basu Baul, Tushar published the artcileSynthesis, characterization and structural systematics in diorganotin complexes with O,N,O’-tris-chelating semirigid diaza-scaffolds: Mono- vs. di-nuclear compounds, Synthetic Route of 96-20-8, the publication is Journal of Organometallic Chemistry (2020), 121522, database is CAplus.
Nine novel diorganotin(IV) complexes of O,N,O’ chelating ligands were synthesized viz., [Bu2Sn(L2)]2·0.25 (C6H14) (1), [Me2Sn(L1)]2·(C7H8) (2), [Bu2Sn(L1)]2·(C7H8) (3), [Me2Sn(L3)]2·(C7H8) (4), 2 [Bu2Sn(L3)]2·4 (Bu2Sn(L3)) (5), [Ph2Sn(L3)] (6), [Ph2Sn(L1)] (7), [Ph2Sn(L4)] (8) and [Ph2Sn(L2)] (9) and structurally characterized. The ligand scaffolds differ with respect to the chem. link between the coordinating N and O atoms, which is either an alkyl or an aryl moiety. Diffraction results indicate that the smallest Me groups favor dimerization via Sn-O-Sn bridging and six-coordination at the cation. Among these dinuclear derivatives, more asym. O bridges and longer Sn···Sn separations are found for the less nucleophilic phenolate O. In contrast, the bulky Ph substituents prevent aggregation for both classes of ligands and always lead to five-coordinated mononuclear species. The Bu groups are sterically more demanding than Me but flexible, resulting in an intermediate behavior. When the O,N,O’ ligand with phenolate O coordinates a SnBu2 fragment, a borderline situation occurs and both mono- and dinuclear complexes coexist in the same crystalline solid. For better comparability the authors introduce a slightly modified geometry index τ’5, in which the basal angle α is subtended by the organic substituents, regardless of its absolute value. τ’5 represents a sensitive indicator for the coordination geometry about SnIV. Sn NMR results revealed that all compounds exist as mononuclear pentacoordinated species in solution
Journal of Organometallic Chemistry published new progress about 96-20-8. 96-20-8 belongs to alcohols-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Alcohol, name is 2-Aminobutan-1-ol, and the molecular formula is C4H11NO, Synthetic Route of 96-20-8.
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