Allylic derivatives of nickel and palladium

Abstract

. Can. J. Chem. 59,996 (1981). The synthesis of novel allylic derivatives of Ni and Pd incorporating the bispyrazolylgallate ligand Me,Ga(N,C,H,),-is described. Pyrazolyl-bridged homobinuclear and trinuclear nickel allyl systems are also presented. Crystal structures of

Salen-supported dinuclear and trinuclear boron compounds

“…These transition metal compounds are almost exclusively monometallic, that is one Salen ligand is coordinated to one transition metal atom. Many Group 13 compounds form monometallic derivatives (aluminum, [10] gallium [11] and indium [12]). However, the Group 13 elements are also capable of forming bimetallic compounds with the Salen ligands (boron, [8] aluminium, gallium, and indium [9]).…”

Synthesis and characterization of transition metal complexes containing novel, unsymmetric tridentate organogallate ligands

“…These ligand systems, containing a pyrazolyl group, together with a bifunctional donor moiety, both attached to a dimethylgallium unit, have been shown to coordinate facially in a variety of octahedral transition metal carbonyl compounds (2-4). In addition both the fac and rner isomers have been structurally characterized for the coordination compound [Me2Gapz(OCH2-CH2NH2)I2Ni (pz = pyrazolyl, N2C3H3) (5). The many novel aspects displayed by compounds incorporating this class of ligand prompted further investigation into the general area of unsymmetrical uninegative organogallate ligands to include the more sterically bulky amino-pyridyl moiety as well as a fused quinolyl "aromatic" unit in the ligand system to give La and L, , respectively :…”

Syntheses and reactivity of square-planar Rh(I) complexes, LRh(CO) (L = unsymmetric tridentate chelating pyrazolylgallate ligand). X-ray crystal structures of [Me2Gapz(OCH2CH2NH2)]Rh(CO) and [Me2Gapz(OCH2CH2NMe2)]Rh(COMe)I (pz = pyrazolyl, N2C3H3)

“…Numerous carbonyl compounds incorporating tridentate pyrazolylgallate ligands of the type 1 have been reported for Cr, Mo, W, Mn, and Re (4,(14)(15)(16)(17)(18). In each of these complexes the pyrazolylgallate anions were found to coordinate exclusively in a fac mode, even though the chelating ligands are capable of meridional coordination.…”

“…In each of these complexes the pyrazolylgallate anions were found to coordinate exclusively in a fac mode, even though the chelating ligands are capable of meridional coordination. For example both the fac and mer isomers have been structurally characterized for the coordination compound [Me2Gapz(OCH2CH2NH2)lzNi (19) and a meridional arrangement is observed in the novel fivecoordinate iron dinitrosyl complex [Me2Gapzu(OCHzCHzNMe2)]Fe(NO), (pz" = 3,5-dimethylpyrazolyl, NzC5H7) (20).…”