Crystal structure of diethyl 2-amino-5-{4-[bis(4-methylphenyl)amino]benzamido}thiophene-3,4-dicarboxylate

Abstract

In the title compound, C31H31N3O5S, the regioselective substitution of the thiophene is confirmed with the amine and the amide at the 2- and 5-positions, respectively. In the molecule, the thiophene ring is twisted by 12.82 (3)° with respect to the aromatic ring of the benzamido group. Intramolecular N—H...O hydrogen bonds are present involving the N atoms of the primary amine and the amide groups, forming S(6) ring motifs. In the crystal, centrosymmetrically related molecules are linked by pairs of N—H...O hydrogen bonds involving the amide carbonyl O atoms and the primary amine N atoms to form dimers of R 2 2(16) ring motif.

Engaging the Reversible Bonds of an Immobilized Styreno-Thiophene Film

“…2A formed two intramolecular bondsone between each of the terminal amines with the adjacent ester carbonyl N1···O2 and N4···O7 (Figure A). This is consistent with similar structures, and it results in an S6-type supramolecular cycle. The crystallographic structure also confirmed that 2A formed intermolecular contacts.…”

“…33 In fact, it is 0.03 Å longer than the corresponding NC bond and 0.06 Å shorter than the 2A). This is consistent with similar structures, 34 and it results in an S6-type supramolecular cycle. The crystallographic structure also confirmed that 2A formed intermolecular contacts.…”

Effect of azomethine structural modification of electrochromic performance

“…19 In fact, the nitrogens of the amine and amide of 3 formed both intra- and intermolecular bonds, resulting in a head-to-head supramolecular dimer. 20 1D also formed hydrogen bonds (Fig. 2B and Table 1).…”

Bis(benzoxazol-2-yl)methanides in main group organometallic syntheses and enquiry-based education

“…[51] Since its introduction, the MetalJet X-ray source has been used in single crystal X-ray diffraction studies involving all kinds of different compounds. From small organic molecules [59][60][61][62][63][64] to proteins, [65][66][67][68] polymers [69,70] and metal organic frameworks. [71] Furthermore inorganic compounds containing p-block elements [72,73] as well as d-metal complexes [74][75][76][77][78][79][80] have been investigated.…”

“…A set of objects prepared in this way and a laboratory stand at hand, in principle all types of screw axes can be modelled, if the correct number of ducks is arranged in a suitable manner. With certain screw axes (42,62,63,64) two or more objects occupy positions at the same height. To be able to accurately model this, special mounts were designed, which have several pieces of sheet metal attached to the same aluminium block (see Figure 2 -18).…”