Crystal structure of tricarbon-yl[η 4 -6- exo -(tri-phenyl-phosphino)cyclo-hepta-2,4-dien-1-one]iron(0) tetra-fluoro-borate.

The mol-ecular structure of tricarbon-yl[η 4 -6- exo -(tri-phenyl-phosphino)cyclo-hepta-2,4-dien-1-one]iron(0) tetra-fluoro-borate di-chloro-methane hemisolvate, [Fe(C 28 H 22 O 4 )(CO) 3 ]BF 4 ·0.5CH 2 Cl 2 , as determined by single-crystal X-ray diffraction is reported. The two independent tricarbon-yl[η 4 -6- exo -(tri-phenyl-phosphino)cyclo-hepta-2,4-dien-1-one] iron(0) cations and their corresponding anions form dimers, which constitute the asymmetric unit of the structure parallel to the (100) plane. Solid-state stability within that asymmetric unit as well as between neighboring dimeric units is afforded by C-H⋯O and C-H⋯F hydrogen bonds and C-H⋯π and Y - X ⋯π ( Y = B, C; X = F, O) inter-actions, which yield diperiodic sheets and a three-dimensional extended network.