“…[29] Satisfyingly,t reatment of 7 with 1.0 equivalent of RhCl-(PPh 3 ) 3 in refluxing dichloromethane afforded rhodium complex 11,w hich was isolated as brown crystals in 55 % yield by recrystallization from Et 2 OatÀ78 8 8C(d 31 P{ 1 H}: 32.9 (dd, 1 J P, Rh = 171.2 Hz, J P, P = 11.0 Hz;P 2), À24.9 (dd, J P, Rh = 30.3 Hz, J P, P = 11.0 Hz;P 1) ppm; n(CO) = 1644 cm À1 ; Scheme 5). [30] TheP Ph 3 ligand in 11 shows astrong trans-influence (P2-Rh1-C4 169.20 (5) 8 8), which leads to elongation of the Rh1 À C4 bond (2.2595 (16) ) versus the shorter Rh1ÀC2 (2.2011 (17) )and Rh1ÀC5 bonds (2.1773 (17) ). [30] TheP Ph 3 ligand in 11 shows astrong trans-influence (P2-Rh1-C4 169.20 (5) 8 8), which leads to elongation of the Rh1 À C4 bond (2.2595 (16) ) versus the shorter Rh1ÀC2 (2.2011 (17) )and Rh1ÀC5 bonds (2.1773 (17) ).…”