Dimethylamino-tris(1-pyrazolyl)borate(1-) Ion, A New Hybrid Poly(1-pyrazolyl)borate Ligand

摘要

Dimethylamilne-tris(1-pyrazolyl)borane, Me2HN-B(pz)3 (Me = CH3), was found to react as the acid HMe2NB(pz)3. The Li salt of this latter was obtained on interaction of the species with MeLi, and on interaction with (MeCN)2MoX(CO)2(eta superscript 3-CH2CRCH2) (X = Cl, Br; R = H, CH3) the complexes (pz)B(mu-pz)2(mu-NMe2)Mo(CO)2(eta superscript 3-CH2CRCH2) were obtained as yellow solids. The coordination of the NMe2 rather than the third pz group from B to Mo was demonstrated by variable temperature 1H NMR studies.