Synthesis and characterization of the cluster complexes containing tetrahedral FeCrCo(μ3-S) cluster cores generated by isolobal displacement reactions. Crystal structures of (η5-RC5H4)FeCrCo(μ3-S)(CO)8 (R=H, CO2Et) and FeCo2(μ3-S)2(CO)9
作者:Li-Cheng Song、Hua-Wei Cheng、Qing-Mei Hu、Zhi Wang
DOI:10.1016/j.jorganchem.2003.09.041
日期:2004.1
The monoanions (eta5-RC5H4)(CO)(3)Cr- (1, R = H; 2, R = Me; 3, R = CO2Et) reacted with tetrahedral cluster FeCo2(mu(3)-S)(CO)(9) to give single isolobal displacement products (eta(5)-RC5H4)FeCrCo(mu(3)-S)(CO)(8) (4, R = H; 5, R = Me; 6, R = CO2Et) in 86-89% yields, whereas monoanion (eta(5)-RC5H4)(CO)(3)Cr- (7, R=C(O)Me) reacted with FeCo2(mu(3)-S)(CO)(9) to afford the expected single isolobal displacement product (eta(5)-RC5H4)FeCrCo(mu(3)-S)(CO)(8) (8, R = C(O)Me) in 5% yield and an unexpected square pyramidal cluster FeCo2 (mu(3)-S)(2)(CO)(9) (9) in 45% yield. Similarly, the dianions [eta(5)-C5H4CH2(CH2OCH2)(n)CH2C5H4-eta(5)][(CO)(3)Cr-](2) (10, n = 1; 11, n = 2; 12, n = 3) reacted with two molecules of FeCo2(mu(3)-S)(CO)(9) to produce double isolobal displacement products [eta(5)- C5H4CH2(CH2OCH2)(n)CH(2)C(5)H(4-)eta(5)][FeCrCo(mu(3)-S)(CO)(8)](2) (13, n = 1; 14, n = 2; 15, n = 3) in 32-36% yields, while treatment of dianion [eta(5)-C5H4C(O)CH2](2)[(CO)(3)Cr-](2) (16) with two molecules of FeCo2(mu(3)-(CO)(9) gave the unexpected square pyramidal cluster FeCo2(mu(3)-S)(2)(CO)(9) (9) in 42% yield and the corresponding double isolobal displacement product [eta(5) -C5H4C(O) CH2](2)[FeCrCo(mu(3)-S)(CO)(8)](2) (17) in 8% yield. Products 4-6, 8, 9, 13-15 and 17 were characterized by elemental analyses, IR and H-1 NMR spectroscopy, as well as for 4, 6 and 9 by X-ray diffraction techniques. (C) 2003 Elsevier B.V. All rights reserved.