Reactions of the complex salt [(μ-PhSe)(μ-CO)Fe~2(CO)~6][Et~3NH] formed from Fe~3(CO)~1~2, PhSeH and Et~3N, with phenylacetylene, β-bromostyrene or p-methoxybenzoyl, acetyl, propanoyl, phenylacetyl, α-methylacryloyl, crotonoyl and cinnamoyl chlorides were studied. Eight new (μ-phenylselenido)(μ-acyl) and (μ-phenylselenido) (μ-vinyl) diiron hexacarbonyl complexes were synthesized and characterized by elemental analysis, MS, ^1H NMR and IR spectroscopy, as well as the single-crystal molecular structure of (μ-phSe)(μ-σ,π-PhCH=CH)Fe~2(CO)~6 determined by X-ray diffraction. Its space group is P2~1/c with cell parameters a=0.9236(2), b=1.0966(3), c=2.0348(6)nm, β=101.53(1)°, D~x=1.77g/cm^3, Z=4, R=0.054, R~w=0.061.

Key words: TRIETHYL AMINE, ELECTROPHILIC REACTION