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C 22 H 56 Co 4 N 12 O 24 ,triclinic, P1 (no. 2), a =7.988(2 Source of material Am ixture of CoO ·6 H 2 O( 0.0582 g, 0.2m mol), oxalic acid (0.018 g, 0.2mmol), ethylenediamine (0.013 ml, 0.2 mmol), and water (0.6 ml) was sealed under vacuum in aP yrex tube and heated to 150°C for 2days under autogenous pressure, followed by cooling to 30°C with 10°C/h. The solid products were recovered by vacuum filtration and washed with water. Red polyhedral crystals suitable for analysis with unidentifieddoi:10.1524/ncrs.2011.0158 fatcat:tsxjkm2pwrgy5eft4ykwq67ugu