Synthesis and Crystal Structure Determination of 3,4‐Dimethoxybenzyl 2,3,4‐Trimethoxyphenyl Ketone

Abstract

X -R a y crystallographic investigation of [he product oblaincd by acylaiion of 1.2.3-rrin~cthoxybenzene with 3.4-dimerhoxyphcnylacciyl cliloridc is rcportcd. The I R and NMR spectral studies in solution are in agrecmenl wiih ihc crystal structure. Thc structurc confirms ihc distorted letrahedral arrangements around thc mcthylcnc group as obscrved lor othcr d co x y b cn z o i n s .

Influence of mesogenic core polarity and position of chains attachment on columnar phase stability

“…at para-(R2), meta-(R3) and ortho-(R4) positions of the phenyl ring. In reported crystallographic structures, [40,41] most frequently the bonds between two first atoms in meta and ortho-(outer) chains are perpendicular to the phenyl ring. In our case, this arrangement can explain the much lower clearing In order to achieve a flat layout of ortho-substituents, the two couples of quasi-isometric substancesindanone and coumaranone derivatives (I-2o and I-2p) and tetralone and chromanone derivatives (I-2q, I-2r, I-2s, I-4s, II-2s and II-4s) -are presented.…”