| A COBALT- SELENIUM CLUSTER WITH TRIPHENYLPHOSPHINE: PREPARATION AND STRUCTURE OF CCo_6Se_8(PPh_3)_6]·THF |
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| 摘 要： | <正> Compound Co6Sc8(Ph3P)6 was obtained by mixing CoBr2, Ph3P, and Na2Se2 in DMF in high yield. It crystallizcs in triclinic system with space group Pland the following unit cell dimensions; a=15. 165(4) ,b= 16. 522 (4) ,c = 21. 274 (5) A .α= 92. 75(2),β=90. 56(2),γ=102.47(2)°,V = 5197. 4 A3.Z = 2,DC=1. 68g/cm3. The final refinement converged with R-. 048 and Rw =0. 059 for 8175 reflections with I≥3σ(I). The molecular structure consists of a slightly distorted octahedral Co6-core. The Co-Co distances fall in the range of 2. 955 - 3. 032A.
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A COBALT- SELENIUM CLUSTER WITH TRIPHENYLPHOSPHINE: PREPARATION AND STRUCTURE OF CCo_6Se_8(PPh_3)_6]·THF |
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| Abstract: | Compound Co6Sc8(Ph3P)6 was obtained by mixing CoBr2, Ph3P, and Na2Se2 in DMF in high yield. It crystallizcs in triclinic system with space group Pland the following unit cell dimensions; a=15. 165(4) ,b= 16. 522 (4) ,c = 21. 274 (5) A .α= 92. 75(2),β=90. 56(2),γ=102.47(2)°,V = 5197. 4 A3.Z = 2,DC=1. 68g/cm3. The final refinement converged with R-. 048 and Rw =0. 059 for 8175 reflections with I≥3σ(I). The molecular structure consists of a slightly distorted octahedral Co6-core. The Co-Co distances fall in the range of 2. 955 - 3. 032A. |
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