Syntheses and Crystal Structures of Two Ferrocenyl Enamine Esters

Abstract

The title compound (I), C 23 H 23 NO 3 Fe, crystallized in the space group P2 1 /c with Z = 4 whereas the compound (II), C 23 H 23 NO 4 Fe, crystallized in the space group Pbca with Z = 8. In each compound of (I) and (II), in addition to a strong [N-HÁÁÁO=C] intramolecular hydrogen bond, an infinite one-dimensional chain in the [010] direction is formed by a C-HÁÁÁO=COEt hydrogen bond for (I) and by C-HÁÁÁO=COEt and C-HÁÁÁO=C hydrogen bonds for (II).

Two seven-membered heterocycles with 1,2-diaza ring N atoms: 3,5,7-triphenyl-1,2-diazacyclohepta-1(7),2-diene and 3,7-bis(2-hydroxyphenyl)-5-phenyl-1,2-diazacyclohepta-1(7),2-diene

“…As in the crystalline state of (II), a low-field signal of the OH group at 12.956 p.p.m. confirms the presence of intramolecular O-HÁ Á ÁN hydrogen bonds in a CDCl 3 solution of (II) (Shi, Zhang, Cheng et al, 2006;Shi & Zhang, 2007;Shi et al, 2012). For both compounds, data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction:…”