Barriers to rotation of the cyclopentadienyl ligand: spin-lattice relaxation time measurements and atom–atom potential calculations on cyclopentadienyl manganese and rhenium tricarbonyl and vanadium tetracarbonyl complexes
Keyword(s):
The barriers to cyclopentadienyl ring rotation in the solid phase have been measured by spin-lattice relaxation time methods for the organometallic complexes CpMn(CO)3 (7.24 kJ mol−1), CpRe(CO)3 (7.15 kJ mol−1), and CpV(CO)4 (7.07 kJ mol−1), where Cp = η5-C5H5. Nonbonded atom–atom potential calculations of the barriers in these complexes and in BzCr(CO)3 (Bz = η6-C6H6) show that the molecular conformation of the Mn and Re compounds is determined by crystal packing forces and that concerted ring motions are possible for the cyclopentadienyl complexes, but not for the benzene chromium tricarbonyl.
1980 ◽
Vol 102
(16)
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pp. 5149-5150
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1979 ◽
Vol 40
(12)
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pp. 1179-1184
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1978 ◽
Vol 39
(C6)
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pp. C6-1215-C6-1216
1980 ◽
Vol 41
(C8)
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pp. C8-674-C8-677
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2004 ◽
Vol 272-276
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pp. E49-E50
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1986 ◽
Vol 140
(1-2)
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pp. 123-129
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