64367-55-1Relevant academic research and scientific papers
The Structure of Carbonyl(1,4-diaza-1,3-diene)(1,3-diene)iron Complexes and its Dependence on the Nature of the Diene Ligand
Fruehauf, Hans-Werner,Wolmershaeuser, Gotthelf
, p. 1070 - 1082 (2007/10/02)
Compounds 1, (DAD)(diene)Fe(CO), have square pyramidal structures with either N,N' apical/basal coordination of the DAD ligand, type 1-C1, or with N,N' basal/basal coordination in type 1-Cs (DAD = 1,4-diaza-1,3-diene).Structural type 1-Cs, which previously was supported by spectroscopic evidence only, is confirmed by X-ray analysis of carbonyl(2,3-dimethylbutadiene)iron (1 ky).The preparation of identical compounds of type 1-C1 by different routes, and the synthesis of examples, of both structural types (characterized by 1H NMR, IR, UV-Vis spect ra) by identical routes, but with dienes of different ?-acidity, demonstrate that the nature of the diene ligand alone is determining the structural type formed.Thus, independent of the DAD ligand, photolysis of (DAD)Fe(CO)3 4 with donor dienes (butadiene, 2-methylbutadiene, etc.) always yields type 1-Cs, while with the pronounced acceptor diene diethyl muconate (v) structural type 1-C1 is formed exclusively.
