Abstract
The title compound, [Re2(C3H7COO)2Cl4{(CH3)2SO}2], comprises binuclear complex mol-ecules [Re-Re = 2.24502 (13) Å] involving cis-oriented double carboxyl-ate bridges, four equatorial chloride ions and two weakly bonded O atoms from dimethyl sulfoxide ligands in the axial positions at the Re(III) atoms. In the crystal, mol-ecules are linked into corrugated layers parallel to (101) by very weak C-H⋯Cl and C-H⋯O hydrogen-bonding inter-actions. C-H⋯Cl hydrogen bonding provides the links between layers to consolidate a three-dimensional framework.
Highlights
The title compound, [Re2(C3H7COO)2Cl4{(CH3)2SO}2], comprises binuclear complex molecules [Re—Re = 2.24502 (13) Å] involving cis-oriented double carboxylate bridges, four equatorial chloride ions and two weakly bonded O atoms from dimethyl sulfoxide ligands in the axial positions at the ReIII atoms
Molecules are linked into corrugated layers parallel to (101) by very weak C—H Cl and C—H O hydrogen-bonding interactions
In our previous work we have shown that such compounds with chloride and alkylcarboxylate equatorial ligands exhibit antitumor, antiradical and hepato- and nephroprotective biological activity with low toxicity (Dimitrov et al, 1978, Shtemenko et al, 2007, 2008, 2009, 2013)
Summary
Binuclear rhenium(III) clusters are classical complexes with a unique quadruple metal–metal bond (Cotton et al, 2005, Golichenko & Shtemenko, 2006). In our previous work we have shown that such compounds with chloride and alkylcarboxylate equatorial ligands exhibit antitumor, antiradical and hepato- and nephroprotective biological activity with low toxicity (Dimitrov et al, 1978, Shtemenko et al, 2007, 2008, 2009, 2013). Labile axial ligands and equatorial chloride groups are the reactive centers in interactions with other chemical compounds and biological macromolecules in vitro and in vivo (Shtemenko et al, 2013). In this context, we present the synthesis and the structure of the title dirhenium(III) complex with isobutyrate equatorial ligands as biologically active groups, which can exhibit antitumor activity in the tetracarboxylate compound Re2(i-C3H7COO)4Cl2 (Shtemenko et al, 2007).
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