Synthesis of Co(ll), Ni(ll), Cu(ll), Pd(ll), and Pt(lV) Complexes with 1<sup>4</sup>,1<sup>5</sup>,3<sup>4</sup>,3<sup>5</sup>-Tetrahydro-1<sup>1</sup><i>H</i>, 3<sup>1</sup><i>H</i>-4,8-diaza-1,3(3,4)-ditriazola-2,6(1,4)-dibenzenacyclooctaphane-4,7-dien-1<sup>5</sup>,3<sup>5</sup>-dithione, and the Thermal Stability of Polyvinyl Chloride Modified Complexes

In the current endeavor, a new Schiff base of 14,15,34,35-tetrahydro-11H,31H-4,8-diaza-1,3(3,4)-ditriazola-2,6(1,4)-dibenzenacyclooctaphane-4,7-dien-15,35-dithione was synthesized. The symmetrical (Q) employed as ligand to produce complexes comprising Co(II), Ni(II), Cu(II), Pd(II), and Pt(II) metal-ions at ratio 2:1 (Metal:ligand). There have been ligands their validated by (FTIR), (UV-visible), 1H-NMR, 13C-NMR, CHNS, FAA spectroscopy, Thermogravimetric analysis (TG), Molar conductivity, Magnetic susceptibility. photostabilization technique enhance polymer also used. Q its were mixed in 0.5% w/w polyvinyl chloride tetrahydrofuran (THF). photo stabilization films studied 25 °C under irradiation light λ 380–250 nm with intensity 7.75 × 10−9 ein dm−3 s−1. activity these compounds determined monitoring hydroxyl, carbonyl, polyene indexes, weight loss method time. ICO, IPO IOH index values increased time, this increase depends on type additives. surface morphology for during This project is highly intriguing ecosystem regards decrease consumption plastic.