1,4-Bis[3-(N-ethyliminomethyl)-2-hydroxy-5-methylbenzyl]piperazine

1,4-Bis{2-hydroxy-3-[N-(2-hydroxyethyl)imino]-5-methylbenzyl}piperazine

“…The bond lengths observed in the two phenyl rings agree with each other and are comparable with average values reported in the literature (Domenicano et al, 1975;Allen et al, 1987). The bond lengths and angles observed in the piperazine ring are comparable with those of related reported structures (Gunasekaran et al, 1996;Thirumurugan et al, 1998). The bond lengths C23ÐN24 and C30Ð N31, which are 1.260 (2) and 1.252 (3) A Ê , respectively, indicate a double-bond character (Thirumurugan et al, 1998).…”

“…they adopt Àantiperiplanar and +antiperiplanar conformations with respect to one another. The torsion angles C5ÐC6ÐC7ÐN8 and C16ÐC15ÐC14ÐN11 [76.6 (2) and À78.3 (2) , respectively] de®ne the orientation of the substituents on the piperazine ring; both are in equatorial positions and the molecule thus has an extended conformation and is pseudocentrosymmetric (Thirumurugan et al, 1998).…”

1,4-Dibenzylpiperazine

“…2. The piperazine ring exhibits a chair conformation with the usual bond lengths and angles (Yogavel et al, 2003), comparable with those of related reported structures (Gunasekaran et al, 1996;Thirumurugan et al, 1998).…”

“…For the synthesis of related compounds, see: Zheng et al (2005); Sarangarajan et al (2005). For related structures, see: Yogavel et al (2003); Gunasekaran et al (1996); Thirumurugan et al (1998).…”

Synthesis and Structural Characterization of Hydrazine Bridged Imidazole and its Fumarate Salt

“…All the bond lengths and bond angles are in the normal range. The bond length N(3)-C(5) (1.288(4) Å ) indicates a doublebond character [24]. The imidazolyl rings are located antiparallely above and below the benzene planes, respectively.…”