Two complexes of CuBr(2) with 5-tert-butylpyrazole.
trans-Dibromobis(5-tert-butylpyrazole-N(2))copper(II), trans-[CuBr(2)(Hpz(tBu))(2)] (Hpz(tBu) is 5-tert-butylpyrazole, C(7)H(12)N(2)), exhibits a distorted square-planar geometry with a significant tetrahedral twist, while trans-dibromotetrakis(5-tert-butylpyrazole-N(2))copper(II), trans-[CuBr(2)(Hpz(tBu))(4)], adopts a distorted octahedral geometry across a crystallographic inversion centre. Both compounds exhibit intramolecular N--H...Br hydrogen-bonding interactions.
Liu
X
X
School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, England.
Kilner
C A
CA
Thornton-Pett
M
M
Halcrow
M A
MA