1:1 Complexes of dimethyltin dihalides with tris(2,6-dimethoxyphenyl)phosphine oxide, its sulphide, and related compounds

Add time:08/04/2019    Source:sciencedirect.com

Dimethyltin dihalides Me2SnX2 (X = Cl, Br) only form 1:1 complexes with 2,6-dimethoxyphenylphosphine oxides Φ3PO, PhΦ2PO and Ph2ΦPO (Φ = 2,6-(MeO)2C6H3) even though the ligands are used in excess. 2,6-Dimethoxyphenylphosphine sulphides Φ3PS and PhΦ2PS also form analogous 1:1 complexes, while Ph2ΦPS and Ph3PS do not react. X-Ray crystal structural analysis of Me2SnCl2·OPΦ3 reveals that the tin atom is penta-coordinated in a distorted trigonal bipyramidal arrangement, with a chlorine and two methyl carbon atoms in the equatorial positions and the other chlorine and the Φ3PO oxygen atom in the axial positions.

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