Chelate-Stabilized Diphosphene and Diphosphorus Complexes of Nickel

✍ Scribed by Prof. Dr. Hans Schäfer; Dipl.-Chem. Dieter Binder; Prof. Dr. Dieter Fenske

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 340 KB
• Volume: 24
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.198505221

✦ Synopsis

160°C; 3.4% yield). All spectroscopic data of 3 and 4 agree well with the assumption of bis(tricarbonyliron) complexes of 1 and 2, respectively.[41 With regard to the bonding sites of the two tricarbonyliron units the molecular structure obtained for 4 by X-ray analysis was of special interest. Figure l a shows a sideview of the C, structure of the complex, from which the positions of the tricarbonyliron groups above and below the para-quinodimethane unit and the deformation from planarity of the latter can be seen. The complex consists of two trimethylenemethane-like sections with short distances between Fe and C(1), C(4), C(3i) and and) pm, resp.]. This type of bonding is also supported by the carbon-carbon bondlengths of the quinodimethane moiety which shows equal distances for C( 1 ) . . . C(4), C( 1). . . C(2) and C( 1). . . C(3i) (Fig. lb). Furthermore, the subdivision into two trimethylenemethane parts is impressively demonstrated by the long bond length of 146.2(1) pm found for the bonds C(2)...C(3) which are the formal double bonds of the