[Cl5Ta([mu]-O)TaCl3{iPrS(CH2)2SiPr}] and [(TaCl4)2([mu]-O)([mu]-Me2Se2)]: two chalcogenoether complexes of Ta2OCl8 with very different geometries

The title compounds, [1,2-bis(isopropylsulfanyl)ethane-2κ2S,S']octachlorido-1κ5Cl,2κ3Cl-μ-oxido-ditantalum(V), [Ta2Cl8O(C8H18S2)], (I), and μ-dimethyldiselane-κ2Se:Se'-μ-oxido-bis[tetrachloridotantalum(V)], [Ta2Cl8O(C2H6Se2)], (II), contain six-coordinate TaV centres linked by a nonlinear...

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Bibliographic Details
Published in:Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2011-07, Vol.67 (7), p.m221
Main Authors: Benjamin, Sophie L, Hyslop, Alison, Levason, William, Webster, Michael
Format: Article
Language:English
Subjects:
Chemical bonds
Chemical compounds
Crystal structure
Crystallography
Online Access:Get full text
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Summary:The title compounds, [1,2-bis(isopropylsulfanyl)ethane-2κ2S,S']octachlorido-1κ5Cl,2κ3Cl-μ-oxido-ditantalum(V), [Ta2Cl8O(C8H18S2)], (I), and μ-dimethyldiselane-κ2Se:Se'-μ-oxido-bis[tetrachloridotantalum(V)], [Ta2Cl8O(C2H6Se2)], (II), contain six-coordinate TaV centres linked by a nonlinear oxide bridge. Compound (I) contains one TaV centre bonded to a chelating dithioether and three terminal chloride ligands, with the second TaV centre bonded to five terminal chloride ligands. In (II), two tetrachloridotantalum(V) residues are bridged by the diselenide, giving a puckered five-membered Ta/O/Ta/Se/Se ring. The Ta--O distances in the bridges are short in both compounds, indicating that significant multiple-bond character is retained despite the deviation from linearity, and the bond lengths reveal a clear trans influence order of O > Cl > S > Se on the hard TaV centre. The structures are compared with the [Ta2Cl10O]2- anion, which contains a linear oxide bridge. [PUBLICATION ABSTRACT]
ISSN:0108-2701
1600-5759
DOI:10.1107/S0108270111022037