Crystal structures of trans-[NiBr₂(pyridine)₄] and [Ni(HNPEt₃)₄]I₂

Titelangaben

Gröb, Thorsten ; Neumüller, Bernhard ; Harms, Klaus ; Schmock, Fritjof ; Greiner, Andreas ; Dehnicke, Kurt:
Crystal structures of trans-[NiBr₂(pyridine)₄] and [Ni(HNPEt₃)₄]I₂.
In: Zeitschrift für anorganische und allgemeine Chemie. Bd. 627 (2001) Heft 8 . - S. 1928-1931.
ISSN 1521-3749
DOI: https://doi.org/10.1002/1521-3749(200108)627:8<1928::AID-ZAAC1928>3.0.CO;2-V

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Abstract

Turquoise single crystals of trans-NiBr2(pyridine)(4)] have been obtained by the reaction of excess pyridine with nickel(II) bromide/diacetonealcohol. According to the crystal structure determination the nickel atom is octahedrally coordinated by the two bromine atoms in trans-position and by the nitrogen atoms of the pyridine molecules. Space group Pna2(1), Z = 4, lattice dimensions at 20 degreesC: a = 1592.9(2) b = 943.8(1), c = 1413.0(2) pm, R-1 = 0.0492. Dark blue single crystals of the phosphoraneimine complex Ni(HNPEt3)(4)]I-2 have been obtained from NiI2/H2O with excess Me3SiNPEt3 and subsequent re crystallization from acetonitrile. According to the crystal structure determination the nickel atom is tetrahedrally coordinated by the nitrogen atoms of the HNPEt3 molecules. The iodide ions are connected via N-H (. . .) I contacts with the cation to form an ion triple. Space group P2(1)/c, Z = 4, lattice dimensions at -80 degreesC: a = 1934.9(2), b = 1078.3(1), c = 1966.3(2)pm, beta = 111.040(8)degrees; R-1 = 0.043.