Synthesis and topology analysis of chlorido-triphen-yl(triphenyl phosphate-κ O)tin(IV)

Abstract

The title Sn^IV complex, [Sn(C₆H₅)₃Cl(C₁₈H₁₅O₄P)], is a formal adduct between triphenyl phosphate (PhO)₃P=O and the stannane derivative chlorido-tri-phenyl-tin, SnPh₃Cl. The structure refinement reveals that this mol-ecule displays the largest Sn-O bond length for compounds including the X=O→SnPh₃Cl fragment (X = P, S, C, or V), 2.6644 (17) Å. However, an AIM topology analysis based on the wavefunction calculated from the refined X-ray structure shows the presence of a bond critical point (3,-1), lying on the inter-basin surface separating the coordinated phosphate O atom and the Sn atom. This study thus shows that an actual polar covalent bond is formed between (PhO)₃P=O and SnPh₃Cl moieties.

Keywords: QTAIM; crystal structure; stannane; topology analysis; tri­phenyl­phosphate.