Tricarbonyl[2–5-η-(methyl 3,5-dimethoxy-1α-methyl-2,4-cyclohexadiene-1β-carboxylate)]iron(0)

Tricarbonyl{(4–7-η)-3-acetyl-3a,7a-dihydro-6-methoxy-2-methylbenzo[b]furan}iron(0), C15H14FeO6

“…Details of the metal-ligand bonding arrangement in (3) agree well with those reported for other tricarbonyl(1,3-cyclohexadiene)iron derivatives (Dunand & Robertson, 1982, and references therein). The (diene)Fe(CO) 3 moiety has approximate C s symmetry.…”

“…The (diene)Fe(CO) 3 moiety has approximate C s symmetry. Particularly noteworthy are the shortness of the O(1)--C (2) Shelter, 1973Shelter, , 1974Dunand & Robertson, 1982) and thought to typify points along the reaction pathway for nucleophilic attack (B/irgi et al, 1973, 1974). Bond distances, both for the five-atom conjugated systems and for the dihydrofuran moieties generally, agree closely in both molecules.…”

“…Bond distances, both for the five-atom conjugated systems and for the dihydrofuran moieties generally, agree closely in both molecules. Particularly noteworthy are the shortness of the O(1)--C (2) Shelter, 1973Shelter, , 1974Dunand & Robertson, 1982) and thought to typify points along the reaction pathway for nucleophilic attack (B/irgi et al, 1973, 1974). No such interactions are apparent in the present compound, and in this instance the deformation appears to be due to a series of weak intermolecular non-bonding interactions [O...H and O...C] to O(11).…”

Conformational effects in the fluorescence and photochemistry of [2.n](9,10)anthracenophanes (n = 4, 5)

“…This is to be compared with the observed value of 120.1°in the molecular structure of the photoisomer of 1,4-di(9-anthryl)butane. 13 The molecular force field calculations have provided two photoisomer structures with very similar enthalpies. Emphasis has been given to one of these (IPb) by analogy with the known structure of the 1,4-di(9-anthryl)butane photoisomer.13 However, no other evidence was found from conformational analysis which argues against the formation of IPa.…”