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The reaction of octacarbonyldicobalt and dipropargyl malonate afforded the two expected compounds [CH 2(CO 2CH 2C 2H|μ) 2][Co 2(CO) 6] 2 1 and [HC 2CH 2O(O)C~CH 2CO 2CH 2C 2H|μ][Co 2(CO) 6)] 2. Both 1 and 2 were characterized by elemental analysis, IR and NMR. The molecular structure of 1 was determined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with the following crystallographic parameters~: a=7.7492(15), b=12.925(3), c=14.366(3) , α=81.92(3), β=77.94(3), γ=89.48(3)°, V=1392.9(5) 3, Z= 2, M r=751.99, D c=1.793 g/cm 3, F(000)=740, μ(Mo-Kα)=24.13 cm -1 and final R=0.0880 for 5421 observations with I>2σ(I).
The reaction of octacarbonyldicobalt and dipropargyl malonate afforded the two expected compounds [CH 2 (CO 2CH 2C 2H | μ) 2] [CO 2 (CO) 6] 2 1 and [HC 2CH 2O (O) C ~ CH 2 CO 2 CH 2C 2H | μ] [Co2 (CO) 6)] 2. Both 1 and 2 were characterized by elemental analysis, IR and NMR. The molecular structure of 1 was determined by single-crystal X-ray diffraction belongs to the triclinic system, space group P1 with the following crystallographic parameters ~: a = 7.7492 (15), b = 12.925 (3), c = 14.366 ), γ = 89.48 (3) °, V = 1392.9 (5) 3, Z = 2, M r = 751.99, D c = 1.793 g / cm 3, F (000) = 740, = 24.13 cm -1 and final R = 0.0880 for 5421 observations with I> 2σ (I).