A new polymorph, formC, of [1,2-bis(diphenylphosphino)ethane]dichloronickel(II)

Abstract

The title compound, [NiCl2(C26H24P2)], has arisen as a result of the unexpected reduction (hydrogenation) of the trans-1,2-bis(diphenylphosphino)ethene ligand. The hydrothermal reaction conditions have produced a third polymorphic form of the compound which has twofold symmetry, crystallizes in an enantiomer-selective manner and contains an unexpectedly short C-C (ethane) bond. Contacts of the form C-H...Cl are present, one involving alkyl and the other aryl hydrogen, with C.Cl distances of 3.556 (4) and 3.664 (6) A, respectively.

14 Iron, cobalt and nickel

“…78 The structure of a new polymorph of [NiCl 2 (dppe)], formed by reduction of a Ph 2 PCH᎐ ᎐ CHPPh 2 ligand, has been reported. 79 The use of a bulky chelating phosphine has assisted in the synthesis of nickel complexes with low co-ordination numbers, notably the three-co-ordinate amide [Ni(dtbpe)(NH(2,6-Pr…”

Absence of magnetic order in dichloro [1,2-bis (diphenylphosphino) ethane] nickel2+ single crystal*

“…The NiCl 2 (dppe) solvate has been characterized by solid-state P-31 NMR spectroscopy, x-ray diffraction, infra-red, laser Raman spectroscopy, FAB mass spectroscopy, elemental analyses, and melting points. [16][17][18][19][20][21] NiCl 2 (dppe) crystallizes in the monoclinic structure (space group P2 1 /c), with the Ni 2+ ions forming zig-zag chains along c-axis (shown in Fig. 1(b)).…”