Phosphoraneiminato complexes of manganese and cobalt with heterocubane structure

The phosphoraneiminato complexes [MnBr(NPEt3)]4 (1) and [M4Br5{NP(NMe2)3}3] with M = Mn (2) and M = Co (3) are prepared by melting reactions from the anhydrous metal dibromides with the silylated phosphaneimines Me3SiNPR3 (R = Et, NMe2) in the presence of potassium fluoride. All complexes are characterized by crystal structure analyses. 1 forms an only slightly distorted Mn4N4 heterocubane skeleton with an approximate Td symmetry and short Mn…Mn distances of average 295.7 pm. In the structures of 2 and 3 one μ3-NPEt3 ligand of 1 is replaced by one bromine atom with μ3-function. This leads to the novel heterocubane type M4N3Br with approximate C3 symmetry. The deformation of the cubic skelet…

Book Review: Classics in Total Synthesis. Targets, Strategies, Methods. By K. C. Nicolaou and E. J. Sorensen

Classics in Total Synthesis. Targets, Strategies, Methods. VonK. C. Nicolaou und E. J. Sorensen. VCH, Weinheim, 1996. 798 S., geb./ Broschur 128.00 DM/78.00 DM. - ISBN 3-527-29284-5/3-527-29231-4

Activated Metals in Organic Synthesis. VonP. Cintas. CRC Press, Boca Raton, USA, 1993. 236 S., geb. 59.95 $. – ISBN 0-8493-7863-X