3,4:9,10-Dibenzo-1,12-diformyl-5,8-dioxododecane

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean '(C±C) = 0.005 A Ê R factor = 0.086 wR factor = 0.240 Data-to-parameter ratio = 17.4For details of how these key indicators were automatically derived from the article, see

1,2-Bis(2,4-dinitrophenoxy)ethane

“…1). The bond lengths and angles (Table 1) in the structure are comparable with those observed in related structures (Bailey et al, 1989;Aravindan et al, 2003). The molecule adopts a trans con®guration about the ethylene C7ÐC7 i bond [O5ÐC7ÐC7 i Ð O5 i = 180 ].…”

Crystal structure of (6E,20E)-3,24-difluoro-13,14,28,29-tetrahydro-5H,22H-tetrabenzo[e,j,p,u][1,4,12,15]tetraoxacyclodocosine-5,22-dione

“…The bond lengths and angles are similar to those observed in one of the starting materials for the synthesis of the title compound, viz. 2,2 0 -[ethane-1,2-diylbis(oxy)]dibenzaldehyde (Aravindan et al, 2003;Zhang et al, 2003); both measured at room temperature. A low temperature (120 K) structure analysis of the same compound has also been reported (Akkurt et al, 2013).…”

4-{2-[2-(4-Formylphenoxy)ethoxy]ethoxy}benzaldehyde

“…Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97. There has been, in recent years, a considerable interest in the study of aldehydes (Aravindan et al, 2003;Han & Zhen 2005;Qi et al, 2005), since these compounds are commodity chemicals used as intermediates in the manufacture of acids or alcohols, and to produce many important industrial products. Aldehydes are also used as important precusors in the synthesis of macrocyclic or/and macrobicyclic compounds by [1 + 1], [2 + 2] or [2 + 3] condensation with polyamines (Ma & Liu, 2003a;Ma & Liu, 2003b;Ma & Cao, 2005;Ragunathan & Bharadwaj, 1992;Ray & Bharadwaj, 2006).…”