Yg. Zhang et al., SYNTHESIS AND X-RAY STRUCTURE OF AN IRIDOCENIUM(1-) COMPLEX - [IR(C5ME5)(2)][SM(C5ME5)(2)CL-2]() ICHLOROBIS(PENTAMETHYLCYCLOPENTADIENYL)SAMARATE(1), Bulletin of the Chemical Society of Japan, 71(6), 1998, pp. 1381-1384
Reaction of [{Sm(C5Me5)(mu-OAr)}(2)] (Ar= 2, 6-(t-Bu)(2)-4-MeC6H2) or
[Sm(C5Me5)(2)(thf)(2)] with 1 equiv of [{Ir(C5Me5)Cl(mu-Cl)}(2)] in TH
F gave the ''ate'' complex [Ir(C5Me5)(2)][Sm(C5Me5)(2)Cl-2] (1) as ora
nge-red crystals in 60-74% yields (based on Sm). Complex 1 represents
the first example of a structurally characterized metallocenium lantha
nocene dihalide complex. Crystal data for 1: monoclinic, space group P
2(1)/m (No. 11), a = 9.781(4), b = 14.956(4), c = 13.842(5) Angstrom,
beta = 93.38(3)degrees, V= 2021(1) Angstrom(3), Z=2, D-c = 1.57 g cm(-
3), R = 7.75%, R-w = 9.23%, GOF = 1.12.