Molecular design, synthesis and characterization of aromatic polythioester and polydithioester

Catalytic Assessment of Copper(I) Complexes and a Polymer Analog towards the One‐Pot Synthesis of Imines and Quinoxalines

“…31 P NMR spectrum showed a signal at 29.2 ppm which indicated the presence of polymer‐bound triphenyl phosphane.. During the anchoring process, the replacement of only one triphenylphosphane by polystyrene supported triphenylphosphane cannot be ruled out. Figure S17 displays 13 C MAS NMR spectrum of 4 in which C=S and C=O carbons resonated at 208.2–195.0 ppm, and aromatic carbons resonated in the region 119.6–163.8 ppm , . In addition, aliphatic carbons present in the polymeric chain were elucidated by the presence of signals at 11.1–66.8 ppm.…”

N,N′-(Ethane-1,2-diyl)dibenzenecarbothioamide

“…This (Palmer & Brisse, 1980). In contrast with models of the polythioester (X = O, Y = S, and m = 2) and polydithioester (X = Y = S and m = 2) (Abe et al, 2011;Abe & Sasanuma, 2012), EDBA and EDBTA do not crystallize in the most stable conformation suggested by the MO calculations probably because of the significant stabilization of the intermolecular C=O···H-N and C=S···H-N hydrogen bonds.…”

“…For crystal structures and conformations of related compounds with -(C X)-C 6 H 4 -(C X)-Y-(CH 2 ) m -Y-(X = O or S and Y = O, S, or NH) bond sequences, see for example,: Palmer & Brisse (1980); Brisson & Brisse (1986); Abe et al (2011); Abe & Sasanuma (2012, 2013. For the synthesis, see: Jacobson et al (1987).…”

S,S′-Butane-1,4-diyl bis(benzenecarbothioate)

“…In the 2DBS 2 crystal, the S-CH 2 -CH 2 -S bonds lie in the gauche + -trans -gauche -(g + tg -) conformation. Our molecular orbital calculations and NMR experiments (Abe & Sasanuma, 2012) showed that this conformation is significantly stable even in isolated and liquid states owing to the anti-parallel arrangement of S-C═O dipole moments (the intramolecular dipole-dipole interaction). Figure 1 shows the molecular structure of 4DBS 2 .…”

“…For crystal structures and conformations of C 6 H 5 C( O)S-(CH 2 ) n SC( O)C 6 H 5 (n = 2, 3, 5, 7, 9), see: for example, Deguire & Brisse (1988); Leblanc & Brisse (1992); Abe & Sasanuma (2012). Table 1 Hydrogen-bond geometry (Å , ).…”