“…(2)-3-Tributylstannylhept-2-ene 29 (82%). R, (hexane) 0.64; GH(CDC1,)6.1 (1 H,qt, J6.6and 1, 3JS,-Hrrcrns 144),2.2(2H, brt, J 7), 1.7 (3 H, br d, J6.6) and 1 .7-0.7 (34 H, m); Gc(CDC1,) 145,134,40.5,33,29,27,23,20,13.5 and 9; m/z 331 (43%, M -Bu), 275 (31), 235 (3) and 121 (100) (Found: C, 58.9; H, 10.45. CI9H,,Sn requires C, 58.9; H, 10.4%).…”