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Compound (1), [Mo(η5-C5H5)(C7H7Se)(CO)3], is monomeric in the solid state. The Cp(CO)3MoSe moiety (where Cp is cyclopentadienyl) displays a `piano-stool' arrangement with an Mo—Se bond length of 2.6294 (4) Å and an essentially ideal tetrahedral bond angle at selenium [109.74 (8)°]. The binuclear compound (2), [Mo2(η5.C5H5)2(C2H5Se)2(Se)2], consists of linear cp–Mo–Mo–Cp moieties with Mo=Mo double bonds, which are quadruply bridged by two pairs of selenido and ethylselenolato ligands.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks 1, 2, global

fcf

Structure factor file (CIF format)
Contains datablock 1

fcf

Structure factor file (CIF format)
Contains datablock 2

CCDC references: 129296; 129297

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