N-[3,5-Bis(trifluoromethyl)phenyl]-3-methoxysalicylaldimine

Abstract

Key indicatorsSingle-crystal X-ray study T = 180 K Mean '(C±C) = 0.005 A Ê R factor = 0.069 wR factor = 0.195 Data-to-parameter ratio = 10.2 For details of how these key indicators were automatically derived from the article, see

(E)-2-Ethoxy-6-[(4-nitrophenyl)iminomethyl]phenol

“…The C13-O3 and C7-N2 bond lengths verify the enol-imine tautomeric form. These distances agree with the literature [1.352 (3) and 1.280 (4) Å ; Karadayı et al, 2003], which also show the enol-mine tautomeric form. The C4-N1 bond length in (I) is also in a good agreement with the corresponding distances in the literature [1.4671 (18) Å (Zeller & Hunter, 2004) and 1.456 (4) Å (Glidewell et al, 2004)] for compounds which contain a nitro group.…”

(E)-2-[(4-Chlorophenyl)iminomethyl]-5-methoxyphenol and (E)-2-[(2-chlorophenyl)iminomethyl]-5-methoxyphenol: X-ray and DFT-calculated structures

“…Depending on these tautomers, three different types of intramolecular hydrogen bonding are possible in o-hydroxy Schiff bases: (a) O-HÁ Á ÁN in phenol-imine, (b) N-HÁ Á ÁO in keto-amine and (c) ionic N + -HÁ Á ÁO À in zwitterionic forms (see scheme). These forms have been previously observed and investigated widely: for the phenol-imine form, see Ü nver et al (2002) and Karadayı et al (2003); for the keto-amine form, see Pavlović & Sosa (2000) and Koşar et al (2004); for the zwitterionic form, see Nazır et al (2000) and Karabıyık et al (2008). Related to this phenomenon, we present here the crystal and molecular structures of the title compounds, (I) and (II).…”

(E)-4-Methoxy-2-[(4-nitrophenyl)iminomethyl]phenol

“…o-Hydroxy Schiff bases have been found in the keto form (Ü nver, Kabak et al, 2002;Odabaşog lu, Albayrak, Bü yü kgü ngö r & Goesmann, 2003;Kǫ sar et al, 2004;Ersanlı et al, 2004) or in the enol form (Karadayı et al, 2003;Leardini et al, 1998;Ü nver, Yıldız et al, 2002;Elmalı et al, 1998) or as enol/ keto mixtures (Nazır et al, 2000).…”