357429-39-1Relevant articles and documents
Heterometallic complexes and clusters with 2-boratanaphthalene ligands
Braunstein, Pierre,Cura, Elisabeth,Herberich, Gerhard E.
, p. 1754 - 1760 (2001)
The new lithium (2-boratanaphthalene)tricarbonylmolybdates Li[Mo(RBn)(CO)3] (Bn = η5-C10H9B; R = NiPr2, Me) have been prepared and used as nucleophilic reagents for the synthesis of metal-metal bonded complexes and clusters. Dinuclear [(iPr2NBn)(OC)3Mo-An(PPh3)] (7) and trinuclear [Hg{Mo(CO)3(iPr2NBn)}2] (9) and [Ag{Mo(CO)3(iPr2NBn)}{Mo(CO)3[(iPr2H N)Bn]}] (13) chain complexes have been obtained in which the metalate behaves as an anionic two-electron donor metalloligand. In 13, the other metal carbonyl fragment consists of an N-protonated (2-boratanaphthalene)tricarbonylmolybdenum fragment and acts therefore as a neutral, two-electron donor. In the 58-cluster valence electron planar, triangulated cluster [Mo2Pd2(MeBn)2(CO)6(PEt3) 2] (15), the [Mo(MeBn)(CO)3]- fragment is however best viewed as a four-electron donor metalloligand bridging the Pd-Pd bond. These bonding situations are compared with those observed in complexes prepared from the metalate [MoCp(CO)3]- (Cp = η5-C5H5) and this establishes experimentally the isoelectronic and isolobal character of the [Mo(MeBn)(CO)3]- and [MoCp(CO)3]- fragments. The crystal structures of complexes 7, 9, 13 and 15 have been determined by X-ray diffraction.
