Main-group chemistry of the 2,4,6-tris(trifluoromethyl)phenyl substituent: x-ray crystal structures of [2,4,6-(CF3)3C6H2]2Zn, [2,4,6-(CF3)3C6H2]2Cd(MeCN) and [2,4,6-(CF3)3C6H3]2Hg

The molecular structures of (RF)2Zn( 3), (RF)2Cd(MeCN()4 a), and (RF)2Hg (5) have_b een determined by X-ray crystallography (RF = 2,4,6-tris(trifluoromethyl)phenyl). For 3: triclinic, P1, a = 8.339 (3) A, b = 9.064 (2) A, c = 13.499 (4) A, CY = 88.38 (3)O, @ = 87.79 (4)O, y = 76.85 (2)O, V = 992.6 (5) A3, 2 = 2,and R = 3.92%. For 4a: monoclinic, P21/c, a = 10.876 (3) A, b = 16.79 (1) A, c = 13.865 (5) A, @ = 112.81 = 15.294 (3) A, @ = 92.20 (3)O, V = 1066.3 (4) A3, Z = 2, and R = 5.73%. A characteristic structural feature of all three derivatives is weak metal-fluorine interactions. (R&Zn and (RJ2Cd(MeCN) represent the first examples of structurally characterized two- and three-coordinate monomeric diarylzinc and -cadmium.