Tetrakis(acetonitrile-N)copper(I) Tetrafluoroborate

The title compound, [CuXX(H₃CCN)₄]BF₄ is isomorphous with the analogous compounds [M(H₃CCN)₄]ClO₄ (M = Cu, Ag). It contains three independent formula units. A large spread of values of chemically equivalent dimensions is observed, notably in the cations which display tetrahedral coordination at copper, with Cu-N 1.964 (6)-2.028 (6) Å (average 1.993 Å) and N-Cu-N 105.4 (2)-113.4 (2)° (average 109.4°).

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