Synthesis and Spectroscopic Studies of Dicarbonylnitrosyl (η³-Allyl) Iron Complexes

Abstract

Some novel complexes (1-9) of [(η 3 -allyl) Fe(CO)2(NO)] were synthesized by the reaction of tetrabutylammonium ferrate (TBAFe) with different allyl substrates like substituted allyl chlorides, allyl bromides, etc. All the synthesized complexes were characterized on the basis of infrared (IR), nuclear magnetic resonance ( 1 H-NMR and 13 C-NMR), and mass spectroscopic data. The spectroscopic data revealed that decarbonylation occurred in each case. It has also been observed that the cleavage of one CO ligand is more facile when more electron donating substituents are located at the allyl ligand. This tendency goes to an extreme in case of the 1,3-dimethylallyl Fe-complex (9).

Reactivity of (η3-allyl)dicarbonylnitrosyl iron complexes with dimethyl malonate and diisobutyl malonate

“…It is further established in the literature that iron allyl complexes posssessed amphiphilic reactivitirs towards both nucleophiles and electrophiles [9][10][11]. In the above same context of literature, in this paper we report the reactivity of following (η 3 -allyl) iron complexes with dimethyl malonate and di-iso-butyl malonate, which we were synthesized and reported by our group previously [12] …”

“…The reactivity of our earlier reported (η 3 -allyl)dicarbonylnitrosyl iron complexes (1−9) were studied [12]. These complexes have amphiphilic character and react with nucleophile as well as electrophile.…”