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Phenylarsenic(III) and Phenylantimony(III) Bis(dialkyl dithiophosphates): Synthesis and Multinuclear ( , 13C, 31P) NMR and Mass Spectral Studies. Crystal and Molecular Structures of QH5M[S2P(0-/-Pr)2]2 [M = Sb(III) and As(III)]

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The crystal structure of a tin (II) complex of composition Sn[CH 3 C0C:CON(C 6 H 5 )]^CH 3 ] 2 CH 3 OH has been determined. Crystals are monoclinic, space group P2,/c, M=581.20, a=15.441(l), b=18.503(2), c=9.152(l)Ä, ß=106.50(8), V-2507.1 Ä 3 , Z=4, Dcalc =1.540 g cnr 3 -λ(Μο-Κα) = 0.71069 Α, μ=10.62 cm 1 , T=295K, F(000) = 1176, R=0.073 for 3469 unique reflections. The central tin atom is chelated by two crystallographically equivalent heterocyclic ß-diketone ligands. A distorted trigonalbipyramidal geometry has been assigned to this complex as inferred from X-ray crystal data.