triclinic, Pi, u = 1015.5(2), b = 1045.4(4), c = 1700.7(3) pm, 3~ = 105.34(2), p = 90.93(2), 7 = 98.65(10)'. V = 1.7184(6) nm', 2 = 2, P~~,~, , = 2.055 Mgm-3, p(MoK,) = 3.240 mm-', 44Y4 independent reflections were used for the solution and refinement of (3), , 8 = 86.27(3), = 82.91(3)'. V=1,7471(6)nm',Z=2,p,,,,,= 2.364Mgn1-~,p(Mo,,)= 2.743mm-', 4465 independent reflections were used for the solution and refinement of the structure. R1 = 0.0757, wR2 = 0.1992. wR2 = [x w(F: ~ FZ)'/ Z K~] ' " . R1 = C(llFol -l~ll/ZIFol) b) Further details of the crystal structure investigations may be obtained from the Fachinformationszentrum Karlsruhe. Gesellschaft fur wissenschaftlich-technische Information mbH, D-76344 Eggenstein-Leopoldshafen (FRG), on quoting the depository number CSD-57077, the names of the authors. and the journal citation.