Sigma-borane coordinated to nickel(0) and some related nickel(II) trihydride complexes

The reactions of the complexes [(dcype)NiH]2, 1, [(dippe)NiH]2, 2, and [(dtbpe)NiH]2, 3, with a mixture of BEt3 and Super-Hydride (LiHBEt3) afforded sigma-borane nickel(0) compounds of the type [(dcype)Ni(sigma-HBEt2)], 4, [(dippe)Ni(sigma-HBEt2)], 5, [(dtbpe)Ni(sigma-HBEt2)], 6, respectively, with the concomitant formation in each case of [(dcype)2Ni2)(H)3][BEt4], 7, [(dippe)2Ni2(H)3][BEt4], 8 and [(dtbpe)2Ni2(H)3][BEt4], 9, respectively. X-ray crystal structures are reported for 4 and 8.The reaction of BEt3 and LiHBEt3 was also reviewed in detail.     

Die Kristallstruktur von Pentacarbonyl(tri-tert-butylphosphin)wolfram und Tricarbonyl(tri-tert-butylphosphin)nickel

The Crystal Structure of Pentacarbonyl(tri-tert-butylphosphine)tungsten and of Tricarbonyl(tri-tert-butylphosphine)nickel The crystal structures of pentacarbonyl(tri-tert-butylphosphine)tungsten and of tricarbonyl(tri-tert-butylphosphine)nickel have been determined from single crystal X-ray data. Both complexes crystallize with four molecules in an unit cell of symmetry P2₁/n for the tungsten complex and P2₁/a for the nickel compound. Parameters: (CO)₅WP[C(CH₃)₃]₃: monoclinic system, a = 14.514(12), b = 16.439(6), c = 8,957(2), β = 102.16(5)°; (CO)₃NiP[C(CH₃)₃]₃ monoclinic system, a = 14.708(10), b = 15.594(10), c = 8.327(9), β = 105.02(5)°.     

Novel trinuclear copper(II) and nickel(II) metallochelates with nitromalonodialdehyde bis(acylhydrazones)

Novel trinuclear copper(II) and nickel(II) metallochelates with nitromalonodialdehyde bis(acylhydrazone) are synthesized. The compositions and structures of the ligand and complexes are determined from the data of elemental and thermographic analyses, IR and NMR spectroscopies, and magnetochemistry. Details of magnetochemical behavior of the metallochelates synthesized are discussed.     

Novel adducts of ethanedialdioxime with halides of nickel(II) and cobalt(II)

Summary Ethanedialdioxime (glyoxime, gH₂) readily combines with dry CoCl₂, NiCl₂, and NiBr₂ in non-aqueous medium to yield the novel adducts CoCl₂(gH₂), NiCl₂(gH₂), and NiBr₂(gH₂). Synthesis, conventional characterization and magnetic moment data collected in the temperature range 95–293 K are reported for these diamagnetic adducts.