The basic copper(II) trifluoroacetate adduct [Cu20H(02CCF3)s(quinoline)2]2 has been prepared and shown by a crystal structure analysis to have a novel tetranuclear structure. This complex crystallizes in the triclinic space group with a = 10.401 (16)Á,6 = 12.773 (20) Á, c = 15.237 (24) A, a = 58.07 (5)°, ß = 124.22(4)°, 7 = 113.81 (4)°. Observed and calculated densities are 1.73 (2) and 1.76 g/cm3, respectively. The structure deter-(1) R.
Two new organocobalt
complexes, Co2(CO)4(CF3C2CF3)3
and Co2(CO)4(CF3C3H)2-
CF3C2CF3, have been isolated from the
appropriate reactions of hexafluorobut-2-yne with octacarbonyldicobalt and of 3,3,3- trifluoropropyne with
μ-hexafluorobut-2-yne-hexacarbonyldicobalt. The
probable structures of these compounds are discussed in light of their infrared
and nuclear magnetic resonance spectra. ��� The direct formation of complexes of the
type Co3(CO)9CCH2R
has been established in the reactions of several terminal alkynes, RC2H
(R = H, CF3, C6H5), with octacarbonyldicobalt.
The spectroscopic properties of the products so obtained are given.
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