Polymer complexes. LXVI, thermal, spectroscopic studies and supramolecular structure of N-[β-(ethylamino)] acrylamide polymer complexes

Polymer complexes. LXVIII. Spectroscopic studies of supramolecular copper(II) polymeric complexes of biologically active monomer derived from novel sulfa drug

“…These two bands are shifted to lower frequencies upon complexation. The ν(NH) band disappeared after complexation and the appearance of a new absorption band for enolic ν(OH) stretching mode at ca 3377–3453 cm −1 confirms the tautomerization . The coordinating water in complex 4 is characterized by the appearance of two bands at 955 and 835 cm −1 .…”

“…Additionally, the IR spectra of the polymer complexes show bands due to coordinated anions. The spectrum of chloro polymer complex 1 displays a new band at 335 cm −1 assigned to ν(Cu─Cl) . The spectrum of polymer complex 3 shows two bands at 1275 and 1144 cm −1 , assigned to ν as (NO 3 − ) and ν s (NO 3 − ), respectively, indicating that the NO 3 − group acts as a monodentate ligand .…”

“…The characteristic IR frequencies of the polymer complexes are given in Table . The bands due to isoxazole ring stretching vibrations for the ligand (1467, 1417 and 1369 cm −1 ) undergo a shift (1480–1470 and 1434–1304 cm −1 ) in the spectra of copper(II) polymer complexes indicating that the isoxazole moiety participates in coordination with copper(II) ions . In addition, the ligand shows two bands at 1337 and 1156 cm −1 attributed to ν asym (SO 2 ) and ν sym (SO 2 ) stretching vibrations, respectively.…”

“…HL monomer was prepared according to literature methods . The molecular formula is C 13 H 14 N 3 SO 4 ; white solid; yield 65%; m.p.…”

“…Monomer HL was homopolymerized by a method described previously . The IR spectrum of the homopolymer was almost the same as that of the monomer except the absence of a peak at 1585 cm −1 which assigned to the participation of (C═C) in the polymerization.…”