P4 diffractometer, monoclinic, P2,/n, a = 1615.4(7), b = 548.4(3), c = 1646.3(6) pm, = 96.16(2)", V = 1450(1) x lo6 pm3, psalsd =1.284 gem-,, 20, . , = 55", Z = 4, Mo,, radiation, 1 =71.073 pm, w-scan, p = 0.09 mm-', T = 293 K, structure solved by direct methods, 3351 measured reflections, 2945 unique reflections, of which 1792 had F > 3a(F), FJparameter ratio = 9.43, R = 0.066, R, = 0.065, refined versus 1 FI. Residual electron density of the difference-Fourier map: max = 0.22, min = -0.35 e k 3 . Program: SHELXTL-PLUS. Further details of the X-ray structure investigation may be obtained from the Fachinformationszentmm Karlsruhe, D-76344 Eggenstein-Leopoldshafen (Germany), under the depository number CSD-405437.