94294-92-5Relevant academic research and scientific papers
Reactions of transition-metal σ-acetylide complexes. 2. Cycloaddition and subsequent reactions of tetracyanoethylene with some (η-cyclopentadienyl)ruthenium-tertiary phosphine complexes: X-ray structure of Ru{C[=C(CN)2]CPh=C(CN)2}(dppe)(η-C5H 5)·0.5CHCl3
Bruce, Michael I.,Hambley, Trevor W.,Snow, Michael R.,Geoffrey Swincer
, p. 501 - 508 (2008/10/08)
Reactions between Ru(C2R)(L)(L′)(η-C5H5) [R = Me, Ph; L = PPh3; L′ = CO, PPh3, P(OPh)3; LL′ = dppe; not all combinations] and tetracyanoethylene give deep green paramagnetic compounds and cyclobutenyl Ru[C=CRC(CN)2C(CN)2](L)(L′)(η-C 5H5), butadienyl Ru{C[=C(CN)2]CRC=C(CN)2}(L)-(L′)(η-C 5H5), or allylic Ru[η3-C(CN)2CRC=C(CN)2](PPh 3)(η-C5H5) complexes; for L′ = PPh3, the latter is the only product isolated. The cyclobutenyl complexes transform rather readily into the butadienyl complexes, which are also formed by reaction of the allyl complexes with two-electron-donor ligands (CO, CN-t-Bu). In solution, NMR studies indicate the presence of rotational isomers in a solvent-dependent equilibrium. The X-ray structure of Ru{C[=C(CN)2]CPhC=C(CN)2}(dppe)(η-C5H 5) is reported: crystals are triclinic of space group P1 with a = 10.323 (5) A?, b = 12.157 (8) A?, c = 16.64 (1) A?, α = 91.12 (6)°, β = 105.55 (4)°, γ = 95.93 (5)°; Z = 2. The structure was refined by using 4290 data with I > 2.5σ(I) to R = 0.036 and Rw = 0.039. Important bond lengths (A) are as follows: Ru-C = 2.068 (4), butadienyl C=C = 1.346, 1.370 (6); C-C = 1.484 (6), showing localization of the 1,3-diene system; the C4 skeleton is significantly bent (torsion angle between C=C planes = 80.6°).
Cyclopentadienyl-ruthenium and -osmium chemistry. Cleavage of Tetracyanoethylene under Mild Conditions: X-Ray Crystal Structures of 3-C(CN)2CPhC=C(CN)2>(PPh3)(η-C5H5)> and CPh=C(CN)2>(CNBut)(PPh3)(η-C5H5)>
Bruce, Michael I.,Rodgers, John R.,Snow, Michael R.,Swincer, A. Geoffrey
, p. 271 - 272 (2007/10/02)
The reaction between and C2(CN)4 affords 3-C(CN)2CPhC=C(CN)2>(PPh3)(η-C5H5)> (2), which forms CPh=C(CN)2>(L)(PPh3)(η-C5H5)> (5) with L = CO or CNBut; the structures of (2) and (5; L = CNBu
