Photochemistry of .eta.4-cyclopentadiene iron tricarbonyl complexes: transfer of the 5-endo substituent to the iron center following dissociative loss of carbon monoxide

Carbon monoxide and carbon dioxide fixation: relevant C1 and C2 ligand reactions emphasizing (.eta.5-C5H5)Fe-containing complexes

“…;4-ring endo hydrogen to the iron. 83 Whitesides further established that photolyzing Both photolysis of 37 in THF (ambient conditions) and refluxing an n-decane solution (bp 42 originates from the methylene group. The /3-deinsertion step (38 to 39) is well-known for analogous alkyl complexes that activate a /3 C-H bond and extrude alkene under thermal36®'0'92 or photochemical9 conditions.…”

“…Other than reversible phosphine dissociation, the iron acetyl complexes Cp(L)(CO)Fe-COCH3 (83) are thermally robust. These complexes generally decompose only after prolonged heating above ca.…”

Binuclear hexafluorocyclopentadiene iron carbonyls: bis(dihapto) versus trihapto–monohapto bonding in iron–iron bonded structures

“…1) instead lead to hydrogen loss from the C 5 H 6 ring to give very stable Z 5 -C 5 H 5 derivatives. 4,5 The well-known [6][7][8][9] (Z 5 -C 5 H 5 ) 2 Fe 2 (CO) 2 (m-CO) 2 appears to be a thermodynamic sink in such systems. This difference between the behaviors of cyclopentadiene, C 5 H 6 , and its perfluorinated derivative C 5 F 6 is an excellent example of the effects of fluorination on the structure, bonding, and chemical reactivity of ligands bound to transition metal centers.…”

Syntheses, Properties, and X-ray Crystal Structures of Iron and Ruthenium Compounds with the η5-C5Me4CF3Ligand. Compounds of the Type [(η5-C5Me4CF3)M(μ-CO)(CO)]2(M = Fe, Ru)

“…The previously reported [(η 4 -HC 5 H 5 )Fe(CO) 3 ] and [(η 4 -HC 5 Me 5 )Fe(CO) 3 ] complexes are believed to be intermediates in the preparation of [(η 5 -C 5 H 5 )Fe(μ-CO)(CO)] 2 and [(η 5 -C 5 Me 5 )Fe(μ-CO)(CO)] 2 , respectively. 27b,c, Thus, it is likely that complex 5 is also an intermediate in the preparation of 2 . Purified samples of 5 were heated under an argon atmosphere in refluxing octane solvent, but only trace quantities of 2 were observed.…”