The structures of two tetramethyldisilyl complexes of the (η5-C5Hn)Fe(CO)2 (η = 5, 4) system have been determined by using X-ray diffraction methods, [(η5-C5H5)Fe(CO)2]2Si2Me4 (I) and Si2Me4[(η5-C5H4)Fe- (CO)2CH3]2 (II). The Si-Si bond length in I, where the two silicon atoms are attached to Fe atoms, is significantly longer than that in II, where the two iron-containing moieties are connected via the cyclopentadienyl rings. The two iron centers are conformationally trans with respect to the Si-Si bond in I but gauche in the case of II.29Si NMR data for the complexes reinforce the structural data indicating that the two metals activate the Si-Si bond in I.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry