1160697-77-7Relevant academic research and scientific papers
Synthesis, characterization, and reactivity of nickel hydride complexes containing 2,6-C6H3 (CH2PR2) 2 (R = tBu, cHex, and tPr) pincer ligands
Boro, Brian J.,Duesler, Eileen N.,Goldberg, Karen I.,Kemp, Richard A.
, p. 5081 - 5087 (2009)
The syntheses and full characterization of nickel hydrides containing the PCP "pincef"-type ligand, where PCP = 2,6-C6H 3(CH2PR2)2 (R = tBu, cHex, and iPr), are reported. These Ni - H complexes are prepared by the conversion of ( RPCP)NiCI precursors into the corresponding nickel hydrides by use of appropriate hydride donors. Surprisingly, although the (RPCP)NiCI precursors are quite similar chemically, the conversions to the hydrides were not straightforward and required different hydride reagents to provide analytically pure products. While NaBH4 was effective in the preparation of pure (tBuPCP)NiH, Super-Hydride solution (LiEt 3BH in THF) was required to prepare either (chexPCP)NiH or (iPrPCP)NiH. Attempts to prepare a Ni - H from (PhPCP) NiCI with a variety of hydride reagents yielded only the free ligand as an identifiable product. Two of the derivatives, tBu and cHex, have also been subjected to single crystal X-ray analysis. The solid-state structures each showed a classic, near-square planar arrangement for Ni in which the PCP ligand occupied three meridional ligand points with the Ni - H trans to the Ni - C bond. The resulting Ni - H bond lengths were 1.42(3) and 1.55(2) A for the tBu and cHex derivatives, respectively.
