Crystal structure of an iron–antimony molecular complex bis-µ-[dicarbonyl(π-cyclopentadienyl)ferriochloro]-bis{[dicarbonyl(π-cyclopentadienyl)ferriochloro]trichloroantimony}
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 8,p. 778-782
- https://doi.org/10.1039/dt9740000778
Abstract
Crystals of the title complex (I) are triclinic, space group P, with a unit cell of dimensions a= 12·513(3), b= 18·618(5), c= 10·899(3)Å, α= 104·20(2), β= 115·50(2), γ= 92·15(2)°, Z= 2. The structure was solved from diffractometer data by Patterson and Fourier methods and refined by least-squares methods to R 7·4%(2001 observed reflections). Two crystallographically different ‘molecules’ of the title compound are found within the triclinic unit cell, each being independent and having a different crystallographic centre of symmetry. Each ‘molecule’ consists of two SbCl3 and two Fe(C5H5)(CO)2Cl units, linked about a centre of symmetry by weak Sb ⋯ Cl bridges. In the SbCl3 segment a distorted octahedron about antimony is completed by interactions from chlorine atoms from three surrounding Fe(C5H5)(CO)2Cl groups (one terminal and two bridging). The Sb–Cl bonds vary from 2·351(10) to 2·404(9)Å, while the three bridging Sb ⋯ Cl interactions are 3·025(9)–3·307(9)Å. Fe–Cl bonds are 2·279(9) to 2·312(9)Å.Keywords
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