Bimetallic systems. Part 19. Chromium(0)–, molybdenum(0)–, or tungsten(0)–iron(0) carbonyl complexes containing one or two bridging Ph2PCH2PPh2ligands: crystal structure of [(OC)3Mo(µ-Ph2PCH2PPh2)2Fe(CO)3]

Author(s):  
Grant B. Jacobsen ◽  
Bernard L. Shaw ◽  
Mark Thornton-Pett
1999 ◽  
Vol 23 (4) ◽  
pp. 407-416 ◽  
Author(s):  
Teresa Szymańska-Buzar ◽  
Krystyna Kern ◽  
Anthony J. Downs ◽  
Timothy M. Greene ◽  
Leigh J. Morris ◽  
...  

1981 ◽  
Vol 210 (1) ◽  
pp. C1-C4 ◽  
Author(s):  
Henri Patin ◽  
Gerard Mignani ◽  
Christian Mahe ◽  
Jean-Yves Le Marouille ◽  
Alain Benoit ◽  
...  

1986 ◽  
Vol 41 (5) ◽  
pp. 629-639 ◽  
Author(s):  
Anna-Margarete Hinke ◽  
Axel Hinke ◽  
Wilhelm Kuchen ◽  
Wolfgang Hönle

Abstract Reduction of MentPBr2M(CO)5 1 (M = Cr, W) with magnesium in THF yields the diphos­phene complex (CO)5M(Ment)P=P(Ment)M(CO)5 2 as the main product. In addition, a phosphinidene complex, (CO)5M(Ment)PM(CO)5 (3) is also formed. The latter is obtained in larger amounts, if the reaction is carried out in the presence of M(CO)5THF. The proposed structures are confirmed by NMR and UV data as well as - in the case of the chromium compounds (2a, 3a) - by crystal structure analysis. Compound 2a is obtained only as the frans-isomer. The P-P distance in 2a (204.0 pm) indicates a double bond which does not participate in the complex formation. The P-Cr distance in 3a (average: 230.3 pm) is within the low est range found for this element combination. Reaction of 2a with LiAlH4 yields the diphosphane complex (CO)5CrMent(H)P-P(H)MentCr(CO)5 4 as a mixture of “meso” and “rac” diastereomers.


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