Highly tunable fluorinated trispyrazolylborates [HB(3-CF<sub>3</sub>-5-{4-RPh}pz)<sub>3</sub>]<sup>−</sup> (R = NO<sub>2</sub>, CF<sub>3</sub>, Cl, F, H, OMe and NMe<sub>2</sub>) and their copper(<scp>i</scp>) complexes
Dalton transactions