479071-43-7Relevant articles and documents
Reactions of Fe2(Co)9 with azine derivatives: Discovery of new coordination modes and reactivity of new bimetallic compounds
Son, Seung Uk,Park, Kang Hyun,Jung, Il Gu,Chung, Young Keun,Lah, Myoung Soo
, p. 5366 - 5372 (2008/10/08)
Reaction of N,N′-bis-(3-phenyl-allylidene)-hydrazine (1) with Fe2(CO)9 was studied. When the reaction was carried out in refluxing THF, the three mononuclear compounds Fe(CO)3-[PhCH=CHCH=NN=CHR-trans] (3), Fe(CO)3[PhCH=CHCH=NN=CHR-cis] (4), and Fe(CO)3[PhCH=CHCH=N=CHR] (5; R = -CH=CHPh) were obtained. In refluxing toluene, the novel dinuclear compound Fe(CO)3[PhCH=CHCH=NN=CHCH=CHPh]Fe(CO)3 (2) was obtained. Further treatment of 3-5 with Fe2(CO)9 in refluxing toluene eventually led to 2. A detailed study of the reaction of 3-5 with/without Fe2(CO)9 allowed us to establish an overall reaction sequence from 1 to 2. Reaction of the alkyl analogue MeCH=CHCH=NN=CHCH=CHMe (10) with Fe2(CO)9 yielded the two dinuclear compounds Fe(CO)3[MeCH=CHCH=NN=CHCH=CHMeFe(CO)3 (11 and 11′) or the two mononuclear compounds Fe(CO)3[MeCH=CHCH=NN=CHR′-trans] (12) and Fe(CO)3[MeCH=CHCH=NN=CHR′] (13; R′ = -CH=CHMe) and the dinuclear compound anti-Fe(CO)3[MeCH=CHCH=N-N=CHCH=CHMe]Fe(CO)3 (14), respectively, depending upon the reaction conditions. Treatment of 2 with MeLi yielded the dimeric compound [PhCH=CHCH=NN=CHCH= CHPh]2Fe4(CO)12 (16), containing four iron atoms, and treatment with MeLi followed by Mel afforded the dimethyl adduct Fe(CO)3[PhCH=CHCHMeN=NCHMeCH=CHPh]Fe(CO)3 (17). The molecular structures of 3-5, 8, 11, 11′, 14, and 16 were confirmed by X-ray diffraction studies.
