Isolation and characterization of [Fe<SUB>2</SUB>(CO)<SUB>6</SUB>Se<SUB>2</SUB>{μ -(CO)<SUB>3</SUB>Cr(η<SUP>5</SUP>-C<SUB>5</SUB>(H)(CH<SUB>2</SUB>Ph)(Ph)(OEt)}], [(CO)<SUB>6</SUB>Fe<SUB>2</SUB>{μ-EC(Ph)=C(E')C(H)(OEt)}]<SUB>2</SUB> and [(CO)<SUB>6</SUB>Fe<SUB>2</SUB>{μ-SC(H)(Ph)C(Te)=C(H)(OEt)}] from the thermolysis of Fischer carbene adducts [(CO)<SUB>6</SUB>Fe<SUB>2</SUB>EE'{μ-C(Ph)=C-C(OEt)=Cr(CO)<SUB>5</SUB>}] (E, E'=Se and E=S, E'=Te)
- Mathur, Pradeep
- Ghosh, Sundargopal
- Sarkar, Amitabha
- Rheingold, Arnold L.
- Guzei, Ilia A.
DOIAbstract
Thermolysis of the trimetallic adducts [(CO)6Fe2EE'{μ-C(Ph)=C-C(OEt)=Cr(CO)5}] 1a,b (1a: E=E'=Se; 1b: E=S, E'=Te) in refluxing THF yield the following complexes: [Fe2(CO)6EE'{μ-(CO)3Cr(η5-C5(H)(CH2Ph)(Ph)(OEt)}], (2: E=E'=Se); [(CO)6Fe2{μ-EC(Ph)=C(E')C(H)(OEt)}]2, (3a: E=E'=Se; 3b: E=S, E'=Te) and [(CO)6Fe2{μ-EC(H)(Ph)C(E')=C(H)(OEt)}], (4: E=S, E'=Te), where the product formation depends on the nature of chalcogen atoms present in the trimetallic adducts 1a and 1b. All products have been characterized by IR and 1H-, 13C-, 77Se- and 125Te-NMR spectroscopy and structural types were unequivocally established by X-ray crystallographic analysis of compounds 3a and 4
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