C. Serrar et al., Synthesis, structural characterization, and theoretical calculations of a new copper(I)-octahydrotriborate complex, INORG CHEM, 39(10), 2000, pp. 2224
Reactions of CuCl with [R4N][B3H8] (R = Et, n-Pr, n-Bu) salts give the new
[R4N][ClCuB3H8] complexes of copper(I). These compounds have fluxional beha
vior in solution. MP2 and DFT calculations show that the most stable confor
mation of the anion has two boron atoms bound to the metal by two B-H-Cu br
idge hydrogen bonds.