Zinc and cadmium adducts of 2,2′‐Bis(pyrazol‐1‐yl) propane,(LL), a sterically hindering ligand. Crystal structure of (LL)Zn[OC(O)CF 3 ] 2 (H 2 O)

1:1 adducts between the title ligand and MX 2 (M = Zn or Cd; X = Cl, Br, I or trifluoroacetate) as well as ionic compounds [(LL) 5 Zn 2 (H 2 O) 2 ](ClO 4 ) 4 and [(LL) 2 Cd(H 2 O) 2 ](ClO 4 ) 2 are stable in the solid state and in acetone solution, but not in dimethylsulphoxide. In (LL)Zn(H 2 O)[OC(O)CF 3 ] 2 two oxygen atoms (belonging to water and to one OC(O)CF 3 ) at 2.039(4) and 2.008(4) Å from Zn, and one nitrogen atom (ZnN 2.067(3) Å) from the chelating LL define the basal plane of a trigonal bipyramid, which is distorted owing to the steric requirements of the bridgehead methyls of LL; the axial ZnX bonds (X = N 2.125(3) Å; X = O 2.085(4) Å), are longer than the equatorial ZnX bonds.