Nickel-(II), -(III) and -(IV) Complexes of 1,2-Bis(dimethylarsino)tetrafluorobenzene and X-Ray Crystallographic and Extended X-Ray Absorption Fine Structure Studies of Nickel-(III) and -(IV) Bromo Complexes

DOI: 10.1039/DT9910002039

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2039 - 2044 (1991)

Update date:2022-08-03

Topics:

Authors:

Hanton, Lyall R.

Evans, John

Levason, William

Perry, Richard J.

Webster, Michael

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Article abstract of DOI:10.1039/DT9910002039

1,2-Bis(dimethylarsino)tetrafluorobenzene, o-C6F4(AsMe2)2, forms high-spin tetragonal nickel(II) complexes (X = Cl or Br), which remain six-co-ordinate in non-polar solvents, and planar diamagnetic I2.Pseudo-octahedral nickel-(III) and -(IV) complexes n+ are formed on oxidation, and their properties are compared with those of the fluorine-free ligand o-C6H4(AsMe2)2.The X-ray crystal structure of trans-2Br2>BF4 has been determined, and revealed a tetragonal cation with Ni-Br 2.543(1) and Ni-As 2.336(1), 2.339(1) Angstroem.Nickel and bromine K-edge extended X-ray absorption fine structure data are reported for a variety of complexes of Ni^II, Ni^III and Ni^IV with o-C6F4(AsMe2)2, o-C6H4(AsMe2)2 and o-C6H4(PMe2)2, and the results compared with existing data on the chloride analogues.

Full text of DOI:10.1039/DT9910002039

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