Bis{decacarbonylbis[μ-2,2′-(phenylimino)diethanolato]ditin(II)ditungsten(0)(2 Sn—W)} hexacarbonyltungsten(0)

Abstract

In the title 2:1 adduct, [Sn2W2(C10H13NO2)2(CO)10]2[W(CO)6], the complete hexacarbonyltungsten molecule is generated by a crystallographic inversion centre. The heterometallic molecule features a central Sn2O2 core with essentially equal Sn—Oethoxy bond lengths. The second ethoxy O and amine N atoms of each N,O,O′-tridentate ligand coordinate to one Sn atom only. The NO3 donor atoms occupy basal positions and the W atom the apical position in a distorted square-pyramidal geometry for each Sn atom. The W atoms are approximately syn to each other but the central metal core is non-planar [W—Sn...Sn—W pseudo-torsion angle = 43.573 (16)°]. One of the carbonyl ligands in the heterometallic molecule is disordered over two orientations with equal occupancies. In the crystal, the heterometallic molecules associate via C—H...O interactions, forming supramolecular layers with undulating topology in the ab plane. These stack along the c axis, defining voids which are occupied by the W(CO)6 molecules.