Synthesis, Spectral Characterization of Four Symmetrical and Unsymmetrical Organotellurium(II) Compounds: O−H…N, CH…π, and CH…O Secondary Interactions in X‐Ray Crystal Structures of 4‐MeOC6H4TeCH2CH2CH2N═C(CH3)C6H4‐2‐OH (1) and Te[CH2CH2CH2N═C(CH3)C6H4‐2‐OH]2 (2)

The condensation of 3-(4-methoxyphenyltelluro)propylamine and bis(3-aminopropyl) telluride with 2-hydroxyacetophenone formed two Schiff's bases 2-[1-(3(4 methoxyphenyltellanyl)propylimino)ethyl]phenol (1) and Bis 2-[1-(3-iminopropyltellanyl)ethyl]phenol (2), respectively. The reduction of 1 and 2 gave compounds 2-[1-(3-(4-methoxyphenyltellanyl)propylamino)ethyl]phenol (3) and Bis 2-[1-(3-aminopropyltellanyl)ethyl]phenol (4), respectively. These four new organotellurium compounds (1-4) were characterized by H-1 and C-13 NMR and FTIR spectroscopies and atomic absorption spectrophotometer (AAS) (Te). The conductance and molecular weights and composition by elemental analysis (C, H, and N) of 1 and 2 were determined. The compound 4 was also characterized by C-13 DEPT-135 NMR spectrum. The compounds 1 and 3 are unsymmetrical, and 2 and 4 are symmetrical type of telluroethers. The single crystals of 1 and 2 were grown, and their molecular structures were determined by single crystal X-Ray diffraction. The ArC-Te bond length in 1 was found 2.117(7) angstrom. The RC-Te bond length in 1 is 2.141(5) angstrom and in 2 is 2.146(5) and 2.150(6) angstrom. The >CN bond lengths in 1 and 2 were between 1.278(6) and 1.295(6) angstrom. There exists intramolecular O-(HN)-N-... hydrogen bonding [between 1.758(4) and 1.792(4) angstrom] in 1 and 2. In compound 2, these nonbonded interactions result in the formation of a R-2(2) (34) dimeric ring. (CHO)-O-... [2.505(4)-2.516(3) angstrom] in 1 and 2 and CH... pi [2.61(5) and 2.89(4) angstrom] secondary interactions are also present in 2. (C) 2015 Wiley Periodicals, Inc.