ection

Freshly prepared and vacuum dried {Co5} [CoII3CoIII2(Hbda)2(bda)2(ib)6] (0.030 g; 0.02 mmol) was dissolved in 5 mL of DMSO. The green solution was placed in a sealed autoclaveable glass vial (or a Teflon-lined stainless steel autoclave) and kept in an oven 100 °C for 120 h. The oven was then turned off allowed the vial to cool to room temperature over 4 h. Pink needle-shaped single crystals of 1, suitable for X-Ray analysis, were obtained and washed with cold methanol, yield; 0.020 g (95 %, based on Co). Elemental analysis, calcd. for: Co10C72H146N6O26 (2101.28 g mol–1; no solvent): C, 41.15; H, 7.00 and N, 4.00 %. Found: C, 41.11; H, 6.96 and N 3.98 %. MS (MeCN, ESI +): m/z: 2013.3202 (Co10C68H139N6O24+; 100 %; [CoII10(OH)2(bda)6(ib)5]+ –ib–; theoretical: 2013.3155). IR (KBr pellet), νmax / cm−1: 3441 (s, br), 2960 (s), 2928 (s), 2866 (s), 1556 (s), 1477 (m), 1433 (m), 1375 (w), 1361 (w), 1290 (w), 1167 (w), 1095 (s), 1071 (m), 1043 (w), 928 (vw), 894 (m), 849 (w), 764 (vw), 596 (m), 549 (w).