. Can. J. Chem. 65, 2756Chem. 65, (1987. Crystals of [I-(N,N-dimethylammonium)ethyl]ferrocene tartrate dihydrate are triclinjc, space group P I , a = 7.235(1), b = I I .372(2), c = 12.724(3) A, a = 90.78(1), P = 102.75(1), y = 91.76(2)", V = 1020.3 at20 -t 2' C withZ = 2. Thestructure was solved by direct methods. The correct enantiomer was chosen based on full-matrix least-square refinements of each enantiomer. For the correct enantiomer, R = 0.031, R,,. = 0.035 for 11052 reflections with I 2 2u(I). Although the two crystallographically independent units of the complex in the structure are chemically equivalent, they are structurally different. The absolute configuration of the amino-substituted carbon aiom is (S), and that of the tartrate anion is (R,R). The mean ferrocenyl Fe-C bond lengths are 2.037 (2) [Traduit par la revue]
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