177648-41-8Relevant academic research and scientific papers
Synthesis and Reactivity of Organosamarium Diarylpnictide Complexes: Cleavage Reactions of Group 15 E-E and E-C Bonds by Samarium(II)
Evans, William J.,Leman, John T.,Ziller, Joseph W.,Khan, Saeed I.
, p. 4283 - 4291 (1996)
(C5Me5)2Sm (2 equiv) reacts with Ph2EEPh2 to give (C5Me5)2SmEPh2 (E: P, 1; As, 2), while (C5Me5)2Sm(THF)2 (2 equiv) reacts with Ph2EEPh2 to give (C5Me5)2Sm(EPh2)(THF) (E: P, 3; As, 4). 3 and 4 are also available from the reactions of 1 and 2 with THF. 3 and 4 undergo further reaction to produce the THF ring-opened products (C5Me5)2Sm[O(CH2) 4EPh2](THF) (E: P, 5; As, 6). (C5Me5)2Sm (4 equiv) reacts with Ph2EEPh2 to give the mixed-valent (C5Me5)2Sm(μ-EPh2)Sm(C5Me 5)2 (E: P, 7; As, 8). These compounds are also available from the reaction of 1 and 2 with (C5Me5)2Sm. The X-ray crystal structure of 2, crystallized from hexanes (P21/n; a = 26.188(24) A?, b = 9.911(10) A?, c = 23.280(23) A?, β = 97.150(12)°, V= 5995(2) A?3, Dcalcd = 1.488 Mg/m3; Z = 8; T = 156 K), revealed, in addition to a conventional seven-coordinate bent metallocene geometry with 2.698 A? Sm-C(C5Me5) and 2.970 A? Sm-As average distances, two very different Sm-As-C(Ph) angles, 74.2 and 118.7°. As a result, one phenyl group is closer to the metal (2.901 A? minimum Sm-C distance). 4, crystallized from toluene (P21/n; a = 10.713(9) A?, b = 14.143(11) A?, c = 21.620(16) A?, β= 101.08(6)°, V = 3215(4) A?3, Dcalcd = 1.492 Mg/m3; Z = 4; 7= 163 K), and 6, crystallized from hexanes (P21/n; a = 9.3958(16) A?, b = 22.245(3) A?, c = 17.931(3) A?, β = 96.497(11)°, V= 3724(1) A?3, Dcalcd = 1.416 Mg/m3; Z = 4; T= 163 K), have conventional eight-coordinate, bent metallocene structures.
