A cyclo-octa-trienone complex of diiron hexa-carbon-yl.

ABSTRACT: In the title compound, [?-(2,6,7-?:3,4,5-?)-cycloocta-2,4,6-trienone]bis-(tri-carbonyl-iron)(Fe-Fe), [Fe2(C8H8O)(CO)6], the diiron hexa-carbonyl moiety has a sawhorse arrangement, with the OC-Fe-Fe-CO fragment forming the horizontal bar of the horse, and the other four carbonyl groups the legs. The Fe-Fe distance is 2.795?(2)?Å. Each Fe atom is also bonded to three C atoms of the cyclo-octa-trienone ring. One Fe atom forms a ?-bond with one ring C atom, with Fe-C = 2.109?(2)?Å, and also a metal-olefin ?-bond with two C atoms on the other side of the ring, with Fe-C distances of 2.238?(2) and 2.236?(3)?Å. The second Fe atom forms a ?(3)-allyl bond with three other ring atoms, with Fe-C bond lengths of 2.158?(2), 2.062?(2), and 2.123?(3)?Å. Counting the ?- and ?-allyl inter-actions as one bond, the coordinations of the Fe atoms can, respectively, be approximated as octa-hedral and trigonal bipyramidal.

SUBMITTER: Corfield PW 

PROVIDER: S-EPMC4120530 | biostudies-other | 2014 Jul

REPOSITORIES: biostudies-other