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In the trinuclear nickel(II) complex of the title compound, [Ni3(C30H20N4O6)2(C5H5N)2(C2H6NO)2]·2C3H7NO·0.5H2O, the central Ni2+ ion is located on an inversion centre. This Ni2+ ion has a distorted octahedral coordination geometry involv­ing two N and two O atoms from the 2′-salicyl­benzo­hydrazidate ligands in the equatorial plane and two N atoms from two di­methyl­form­amide molecules in the axial positions. The inversion-related outer Ni2+ ions, separated by 9.3038 (7) Å, have square-planar coordination environments.

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The title compound, [Sn(C6H5)(C8H7O3)2(C4H11Si)], was prepared by the reaction of [(CH3)3SiCH2]SnPhBr2 with CH3OC6H5COOH and spasmolytol in refluxing toluene, and characterized by IR, 1H NMR and elemental analyses. The geometry at the six-coordinate SnIV atom is distorted octa­hedral with the equatorial plane made up of four O atoms of two carboxyl­ate groups and the axial positions occupied by a phen­yl substituent and a trimethyl­silylmeth­yl group.
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