R. Clerac et al., A remarkable Cr(III) organometallic compound formed by an unprecedented rearrangement of a formamidinate anion, CHEM COMMUN, (2), 2001, pp. 205-206
In addition to a quadruply bonded dichromium(II,II) compound of unusual str
ucture, we have obtained a dinuclear, antiferromagnetically coupled, Cr-III
complex [Cr-2(mu -OMe)(2)(eta (3)-N,C,N'-H(2)DpyF)(2)Cl-2. MeOH, H(2)DpyF
= CH(NH-pyridyl)(2)] containing a transformed formamidinate group in which
the central carbon atom has changed from sp(2) to sp(3) hybridization and C
r-C bonds have been formed; details of the crystal structure of the organom
etallic compound are given here.