91125-73-4Relevant academic research and scientific papers
Carbene complexes XXIII. Preparation, characterisation, and structures of the enetetramine-derived carbenerhodium(I) chloride complexes R)3>, trans-R'2)>, and 2(323)R2>> (LR or R'2 = (R = CH2Ph or Et, R' = Me) and L(323)R =
Cetinkaya, Bekir,Hitchcock, Peter B.,Lappert, Michael F.,Shaw, David B.,Spyropoulos, Kostas,Warhurst, Nicholas J. W.
, p. 311 - 318 (1993)
From 2> and the enetetramine LMe2, LEt2, LCH2Ph2, or L(323)CH2Ph2 the crystalline complexes R)3> , 2(323)CH2Ph2>> (2), or trans-R)2> have been obtained in high yield .Complex 2 provides a rare example of a bridging bis(carbene)dimetal complex and the first for one derived from an enetetramine.The X-ray structures of 1-5 show that (i) the mutually trans-Rh-Ccarb bonds for 1 and 3 are longer than the cis-; (ii) the Rh-Cl bond lengths range from 2.268(4) (5) to 2.464(6) (3) Angstroem; (iii) in the bis(carbene) complexes 4 and 5, as well as in 2, the five-membered almost planar ring (or fragment for 2) is approximately orthogonal to the plane containing Rh, Cl, and Ccarb, while in the tris(carbene) complexes 1 and 3 the mutually trans-carbene ligands are twisted from a parallel arrangement by 49o; and (iv) the sum of the bond angles at each Ccarb or N is close to 360o.
