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- W2045216924 abstract "Structural characterisation of SnBr4L1(thf) (1) where L1=tBuNH·CO·CO·NHBut and thf = tetrahydrofuran, and SnBr4L2(thf) (2) where L2 = MeNH· CO·CH2·CH2·CO·NHMe, by X-ray crystallographic methods shows OO bidentate chelate bonding for these mononuclear cis-octahedral Sn(IV) complexes. Crystals of 1 are orthorhombic, space group Pcba (No. 61) with Z = 4. R and Rw were 0.072 and 0.073 respectively for 1401 independent reflections above background. The six coordinate tin atoms feature SnBr 2.524(3), 2.504(3) Å and SNO 2.180(14) Å. The solvent thf molecule is symmetrically hydrogen bonded to both NH groups of L1 with O···HN 178°, O···N 2.85(3) Å. Crystals of 2 are triclinic, space group P1 with a = 11.53(1), b = 8.12(1), c = 10.55(1) Å and α = 89.1(1), β = 95.1(1), γ = 94.5(1)o with Z = 2. R and Rw were 0.085 and 0.086 respectively for 967 independent reflections above background. Bond distances for the six coordinate tin atoms are SnBr 2.512(4), 2.520(5), 2.542(4), 2.518(4) Å and SnO 2.148(20), 2.124(18) Å. Two intermolecular hydrogen bonds are present linking one NH group of L2 to a solvent thf molecule O···HN 176°, O···N 2.69 Å, and the other, separately, to a bromine atom of an adjacent molecule Br···HN 172°, Br···N 3.56 Å. A relative ligand binding order succinamide>oxalamide for Sn(IV) is indicated from a direct comparison of SnO bond lengths." @default.
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- W2045216924 date "1987-04-01" @default.
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- W2045216924 title "Studies of oxalamide and dithiooxalamide metal complexes. Part 5. Synthesis and crystal structure determinations of tetrabromo(N,N′-di-tert-butyloxalamide-OO′)tin(IV)-tetrahydrofuran ( 1/1 ) and tetrabromo(N,N′-dimethylsuccinamide-OO′)tin(IV)-tetrahydrofuran (1/1)" @default.
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- W2045216924 doi "https://doi.org/10.1016/s0020-1693(00)86537-8" @default.
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