Vm. Masters et al., SYNTHESIS, STRUCTURE AND MAGNETISM OF THE OXALATO-BRIDGED CHROMIUM(III) COMPLEX [NBU4N](4)[CR-2(OX)(5)]CENTER-DOT-2CHCL(3), Journal of the Chemical Society. Dalton transactions, (3), 1998, pp. 413-416
The binuclear complex [NBu4n](4)[Cr-2(ox)(5)]. 2CHCl(3) has been prepa
red by an ion-exchange procedure employing Dowex 50WX2 cation-exchange
resin in the n-butylammonium form and potassium tris(oxalato)chromate
(III). The dimeric complex was characterised by a crystal structure de
termination: monoclinic, space group C2/c, a = 29.241(7), b = 15.192(2
), c = 22.026(5) Angstrom, beta = 94.07(1)degrees, Z = 4. The magnetic
susceptibility (300-4.2 K) indicated that the chromium(III) sites wer
e antiferromagnetically coupled (J = -3.1 cm(-1)).