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CgMes^SmCTHF^(1) reacts with cyclohexyl isocyanide and tert-butyl isocyanide to form the trimetallic complexes [(CsMes^mtCNR)(µ-CN) ] 3 [R = C6Hn (2); R = Í-C4H9 (3)]. Complex 2 crystallizes from toluene at -34 °C with three toluene molecules of crystallization in space group P2xjc with a = 26.425 (13) Á, b = 13.870 (10) Á, c = 27.206 (19) Á, ß = 91.93 (5)°, and = 1.30 g cm"3 for Z = 4 (trimers). Least-squares refinement on the basis of 6825 observed reflections led to a final R value of 0.074. 2 is comprised of three (CeMeglaSmiCNR) units which are connected by CN bridges. The three Sm atoms define a nearly equilateral triangle which has Sm-C-N-Sm edges. The [Sm(#í-CÑ)]3 unit is planar to within 0.1 Á. The Sm-C-N and Sm-N-C angles range from 167 to 178°, the Sm-CN and Sm-NC distances average 2.57 (2) Á, the Sm-C(CNR) lengths average 2.58 (2) Á, and the Sm-C(C6Me5) average is 2.75 (2) Á.

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