7]undeca-3,5-diene upon UV irradiation in a first step to tetracarbonyl-η4tricyclo[6.3.0.02,7]undeca-3,5-diene-chromium(0) (1), -molybdenum(0) (2) and -tungsten(0) (3). By longer irradiation, dicarbonyl-bis(η4-tricyclo[6.3.0.02,7] undeca-3,5-diene)molybdenum(0) (4) and -tungsten(0) (5) are formed. The complexes were purified by chromatography and studied by IR, 1H, and 13C NMR spectroscopy. The 13C
铬,
钼,和
钨的hexacarbonyls用
三环[6.3.0.0反应2,7 ]在UV照射
十一碳-3,5-二烯在第一步骤中,以四羰-η 4
三环[6.3.0.0 2,7 ] undeca- 3,5-二烯-
铬(0)(1),-
钼(0)(2)和-
钨(0)(3)。通过更长的照射,二羰基双(η 4 -
三环[6.3.0.0 2,7 ]
十一碳-3,5-二烯)
钼(0)(4)和-
钨(0)(5)形成。通过色谱法纯化复合物,并通过IR,1 H和13 C NMR光谱法研究。在13由于受阻的CO加扰,发现1-3个CO
配体的C NMR信号与温度有关。4和5的1 H和13 C NMR信号也与温度有关,表明伪八面体络合物的对映异构体受阻。