Tricarbonyl(fulvene)chromium complexes, (C5H4CR2)Cr(CO)3, react with HgCl2 and SnCl4, respectively, to give stable 1 : 1 adducts. The metal basicity of the tricarbonyl(fulvene)chromium complexes is largely determined by the electronic properties of the substituents R at the exocyclic carbon atom of the fulvene ligand. The first crystalline protonation product of a fulvene complex was obtained by treatment
三羰基(富勒烯)铬配合物(C 5 H 4 CR 2)Cr(CO)3分别与HgCl 2和SnCl 4反应,得到稳定的1:1加合物。三羰基(富烯)铬配合物的金属碱性在很大程度上取决于在富烯配体的环外碳原子上取代基R的电子性质。通过治疗[η获得的富烯复合物的第一结晶质子化产物5 -6,6-双(二甲氨基)亚甲基环戊二烯]的Cr(CO)3与HBF 4。
Kreiter, Cornelius G.; Kurz, Hans, Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1982, vol. 37, # 10, p. 1322 - 1326
The crystal structure of tricarbonyl-6,6'-dimethylfulvene chromium(0) was determined using X-ray diffraction at room temperature and at 120 K. The title compound crystallizes in the centrosymmetric, monoclinic space group P2(1)/n (no. 14) with one complete molecule in the asymmetric unit. The deviation of the chromium(0) complex from C(s)(m) symmetry is negligible in agreement with results derived from density functional calculations using three different methods as well as ab initio calculations (MP2). The 6,6'-dimethylfulvene ligand is bent by 30.9 degrees as a result of the pi-eta(2):pi-eta(2):pi-eta(2) coordination to the Cr(0) metal. In addition, the chromium(0) complex was studied by IR and Raman spectroscopy and selected vibrational data are compared to values derived from DFT calculations. (c) 2010 Elsevier B.V. All rights reserved.