µ-4,4′-Bipyridyl-κ 2 N:N′)bis[bis(tri-tert-butoxysilanethiolato-κ 2 S,O)cadmium(II)] toluene disolvate Anna Dołęga, Katarzyna Baranowska and Agnieszka Pladzyk S1. Comment The asymmetric unit of (I) consists of one half-molecule of the complex and one toluene molecule. An inversion centre is located at the mid-point of the bridging C-C bond of the 4,4′-bipyridine, at Wyckoff position c (0,1/2,0). The 4,4′-bipy rings in compound (I) exhibit deviation from planarity, which is most probably

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... ial" effect resulting from the disorder of the bipyridine moiety. The environment of the Cd can be approximated either to trigonal-bipyramidal or square pyramidal, but distortions are found for both approximations. Molecules of (I) pack in the crystal structure as discrete entities with no interactions other than van der Waals. Also position of solvating toluene is such that no pi-pi stacking can be considered. S2. Experimental Compound (I) was synthesized from dimeric cadmium bis(tri-tert-butoxysilanethiolate) (Wojnowski et al. 1992) . Cadmium bis(tri-tert-butoxysilanethiolate) (1.00 g; 0.75 mmol) was suspended in ethanol (40 ml). 4,4′-bipyridine (0.23 g, 1,5 mmol) and toluene (8 ml) were added to the suspension and the reaction mixture was heated for 1 h. The solution, kept at 269 K, yielded colourless needles suitable for X-ray analysis after approx. one month. S3. Refinement All C-H hydrogen atoms were refined as riding on carbon atoms with methyl C-H = 0.98 Å, aromatic C-H = 0.95 Å and U iso (H) = 1.2U eq (C) for aromatic CH and 1.5U eq (C) for methyl groups. Atoms C25-C26, and C28-C29 in the 4,4′-bipyridine molecule is disordered (0.506 (7)/0.494 (7)). supporting information sup-2