1,2-Bis(imino)acenaphthene complexes of molybdenum and nickel

Abstract

Molybdenum hexacarbonyl reacts with 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene (, dpp-BIAN) and 1,2-bis[(trimethylsilyl)imino]acenaphthene (, tms-BIAN) in toluene to produce (dpp-BIAN)Mo(CO)(4) () and (tms-BIAN)Mo(CO)(4) (), respectively. The reaction of [CpNi(CO)](2) with yields (dpp-BIAN)NiCp (). Metathesis between Li(2)(tms-BIAN) and NiCl(2)(dppe) affords the Ni(0) complex (tms-BIAN)Ni(dppe) (). The diamagnetic compounds , and have been characterized by (1)H, (29)Si and (31)P NMR spectroscopy, IR spectroscopy and elemental analysis. The ESR spectrum of the paramagnetic compound indicates the presence of Ni(i) coordinated by Cp and a neutral dpp-BIAN ligand. The molecular structures of have been determined by single-crystal X-ray analysis.

Magnesium(II) Complexes of the dpp‐BIAN Radical‐Anion: Synthesis, Molecular Structure, and Catalytic Activity in Lactide Polymerization

“…However, these distances are longer than those in the free dpp‐BIAN [both 1.282(4) Å]25 ligand and in the neutral dpp‐BIAN ligand in the molybdenum(0) complex (dpp‐BIAN)Mo(CO) 4 (av. 1.296 Å) 26. In contrast, the C–N bond lengths in 2 , 3 , 4 , and 6 are shorter than that in the dpp‐BIAN dianion in 1 (av.…”

Reduction of Disulfides with Magnesium(II) and Gallium(II) Complexes of a Redox‐Active Diimine Ligand

“…1.328 Å) are longer than C–N bond lengths in free dpp‐bian [both 1.282(4) Å]39 and in its Mo 0 complex (dpp‐bian)Mo(CO) 4 (av. 1.296 Å)40 but shorter than those in the dpp‐bian dianion in 1 (av. 1.389 Å) 9a.…”

The ligand redox behavior and role in 1,2-bis[(2,6-diisopropylphenyl)imino]-acenaphthene nickel–TMA(MAO) systems for ethylene polymerization

“…The experimental spectrum is in agreement with the simulated one and is also similar to that observed for a Cp(BIAN)Ni(I) complex. 19 The appearance of g 1 , g 2 , and g 3 components at 2.361, 2.167, and 2.052, respectively, is indicative of a Ni(I) complex. Complex 4 in toluene solution is ESR silent at room temperature.…”