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0~CH2V207, orthorhombic, Fdd2, a=20.645 (20), b=8.383 (7), c=6.442 (12) A, Z=8, Dexp=3-969, Dx=3.94 g cm -a. Crystals were grown from a melt under 02 atmosphere. The anion, V207, contains a crystallographic twofold axis through the bridging oxygen atom with V-O bond lengths ranging from 1.648 (5) to 1.743 (2) A and a V-O-V angle of 147.8 (5) °. Cu 2+ is bonded strongly to four oxygen atoms with Cu-O bond lengths ranging from 1.880 (5) to 1.972 (5)/~ and weakly to a fifth at 2.542 (4) A.

Hydroxo-Bridged Platinum(II) Complexes. 1. Di^-hydroxo-bis[diammineplatinum( II)] Nitrate, [(NH3)2Pt(0H)2Pt(NH3)2](N03)2.

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The structure of Cd2(AIC14)2 has been determined by X-ray crystallography and the Cd-Cd bond length found to be 2.576 A.Morse and Jones in 1890 first reported that molten CdC12 dissolves a substantial amount of cadmium.' From their melts they obtained black solids of the composition Cd4C17, Cd4Br7, and CdI2Il3 which they claimed contained a CdJ halide as well as the CdII halide. Later, Hollens and Spencer showed that these solids were a mixture of finely divided cadmium and cadmium(rr) halide.' However, from melting point depression studies of solutions of cadmium in cadmium chloride and from the fact that the solutions are diamagnetic, Grjotheim et al. concluded that Cd22+ is formed when cadmium is dissolved in liquid cadmium chloride.3 Their magnetic measurements were in agreement with those of Farquharson and Heymann who also found these solutions to be diamagnetic.4 Grjotheirn et al. concluded that neither the Cd+ ion nor solvated cadmium atoms are present in the melts. The most recent work on CdI salts is due to Corbett and coworkers.5J~They pointed out that