Single-crystal X-ray study T = 296 K Mean '(C±C) = 0.007 A Ê R factor = 0.040 wR factor = 0.059 Data-to-parameter ratio = 13.7 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2002 International Union of Crystallography Printed in Great Britain ± all rights reserved Experimental To a methanol solution (20 ml) containing CoCl 2 (PPh 3 ) 2 (0.654 g, 1 mmol) was added Na(mpo) (0.447 g, 3 mmol), with stirring, at room