Amination of complexed carbon monoxide by N-nitrosamines: syntheses and structures of iron carbonyl and nitrosyl complexes and applications to heterocyclic synthesis

Cyclometalation Using d-Block Transition Metals: Fundamental Aspects and Recent Trends

“…228 The diiron . 229 The five-membered metallacycle in 115 originates from CO insertion into the originally formed Fe-N bond. (R = H) (R = Ph) Double C-H bond activation rather than reductive elimination has been observed with ligand precursors that possess two C-H bonds close to the metal coordination sphere in the precoordination complex.…”

Isomers in the chemistry of iron carbonyls

“…There are two varieties of coordination geometries: a trigonal-bipyramidal (most common) and pseudo-octahedral. In the series of dimeric derivatives, where fi ve donor atoms are bonded to the iron atom, the chromophores are FeC 4 N plus FeC 3 ON (Bladen et al 1993 ), FeC 3 S 2 (Dettlaf et al 1982 , N ö th andRattay 1986 ) FeC 3 OS (Seyferth et al 1991 ), FeC 3 SP (Le Borgne and Mathieu 1981 ), FeC 3 Te 2 (Eichhorn et al 1990 ), FeC 3 P 2 (Cotton et al 1978 ), FeC 3 P 2 plus FeP 3 C 2 (Walther et al 1994 ) and FeC 4 Si (Tobita et al 1994 ). In the series of dimeric derivatives, where are six donor atoms, the chromophores are FeS 3 C 2 P (Taylor et al 1980 ) and FeC 3 Te 3 ( Eveland and Whimire 1996 ) (Taylor et al 1980 ).…”

“…There are 11 dimeric derivatives, and 10 of them contain two crystallographically independent molecules (Cotton et al 1978, Taylor et al 1980 , Le Borgne and Mathieu 1981, N ö th and Rattay 1986, Eichhorn et al 1990, Seyferth et al 1991, Bladen et al 1993, Tobita et al 1994, Walther et al 1994, Eveland and Whimire 1996, and one (Dettlaf et al 1982 ) contains three such molecules and their structural parameters are presented in Table 3 . The structure of red monoclinic [(OC) 6 (Bladen et al 1993 ) is shown in 6 Fe 2 { µ -S 2 (BNMe 2 ) 2 }] ( N ö th and Rattay 1986 ), two Fe(CO) 3 moieties are held together by two sulfur atoms of the respective ligand.…”

“…The structure of red monoclinic [(OC) 6 (Bladen et al 1993 ) is shown in 6 Fe 2 { µ -S 2 (BNMe 2 ) 2 }] ( N ö th and Rattay 1986 ), two Fe(CO) 3 moieties are held together by two sulfur atoms of the respective ligand. The Fe-Fe bond distances and the mean Fe-S-Fe bond angles (dimer 1 vs. dimer 2) are 2.501(I) Å and 66.0(I) ° vs. 2.510(2) ° and 66.4(1) ° .…”

“…The bridging TeCl 2 unit has a trigonal-bipyramidal arrangement of electron pairs with the lone pair occupying an equatorial site. Each iron atom attains an 18-electrons confi guration (Bladen et al 1993 ).…”