Titanium(IV) complexes of the type [(acac)2Ti(O-G-O] and [(acac)2Ti(OCH2CH2SH)2] {where G = (CH2)2, CH2CH(CH3), CH2CH(C2H5), CH(CH 3)CH(CH3) have been synthesized in high yield by the interaction of the precursor [(acac)2Ti( OR)2] {where R = Pri , Et} with a variety of glycols and thioglycols in 1:1 and 1:2 molar ratios in refluxing benzene under anhydrous condition yield heteroleptic derivatives. On the basis of physico-chemical analyses, a cis-octahedral environment around Ti (IV) is proposed.

Madhvesh Pathak

Department of Chemistry

School of Advanced Sciences

Vellore Campus

Samuel B

Tummalapalli K

Giri P.V

Bohra R

Kim K.J.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Advanced Materials Research

A few new and versatile complexes of titanium(IV) derived from 2-hydroxyacetophenone of the types {[(Ap)Ti(OPr i )2-n (L2) n ] (2a, 2e and 2f)}, {[(Ap)Ti(L1OR) (L2)] (2b-2d, 2g-2i)} have been synthesized by the reaction of the precursor [(Ap)Ti(OPr i )2] with different 2-heteroaryl methyl ketone oximes and alkoxyalkanols in various molar ratios in refluxing toluene yielded mono nuclear heteroleptic derivatives, {where, n = 1-2, HAp = 2-hydroxyacetophenone, Pr i = isopropyl, L1 = O-CH 2-CH2-, R = CH3, C2H5, C4H9 and HL2=HONC(Me)py-2, HONC(Me)fu-2}. All these newly synthesized complexes were characterized by elemental analysis, mass, UV, FT-IR and NMR (1H, 13C) spectral studies. The mass spectra of the newly synthesized molecules indicate their monomeric state. Spectral studies suggest the bonding between metal and ligands in a tetra coordinated fashion. Thermogravimetric analyses indicate the multistep decomposition of complexes resulting TiO2 as the end product at 600 C. Antibacterial activities of these complexes were also exercised. Complex 2e is equipotent to the standard drug against Pseudomonas aeruginosa and Escherichia coli. A keen molecular docking study revealed lesser docking scores of some of these complexes than that of the standard drug gentamicin. © 2013 Springer Science+Business Media New York.

Medicinal Chemistry Research

Novel heteroleptic complexes of titanium(IV) derived from 2-hydroxyacetophenone: synthesis, characterization, antibacterial and molecular docking studies

Titanium complexes of the type [(OPri)4-nTi(OC2H 4OR)n], [(acac)2Ti(O-G-O] and [(acac) 2Ti(OPri)(OCH2CH2SH)] were synthesized from stoichiometric reactions between titanium tetraisopropoxide [(Ti(OPri)4, TPT] and alkoxyalkanols {HOCH2CH 2OR} in 1:1 to 1:4 molar ratios, where R = Et and n-Bu and by the interaction of the precursor [(acac)2Ti(OR)2] with different diols and thiol in 1:1 molar ratio, where G = (CH2) 2, (CH2)5 and C(CH3) 2CH2CH(CH3), R = isoprop. The reactions have been carried out in refluxing benzene under anhydrous conditions to yield mononuclear derivatives. All these compounds were purified by distillation under reduced pressure. On the basis of elemental analysis, IR and NMR (1H and 13C) spectral studies tetrahedral as well as a cis octahedral geometry around Ti(IV) is proposed.

Fulltext

Asian Journal of Chemistry

Alkoxyalkanol and Diol Modified Titanium Tetraisopropoxide: Synthesis and Characterization of Some Novel Precursors for Titania

Advanced Structured Materials

Recent Trends in Nanomaterials

Reactions of [Ti(OPri)4] with various oximes, in anhydrous refluxing benzene yielded complexes of the type [Ti{OPr i}4-n{L}n], where, n = 1-4 and LH = (CH3)2CNOH (1-4), C9H16CNOH (5-8) and C9H18CNOH (9-12). The compounds were characterized by elemental analyses, molecular weight measurements, FAB-mass, FT-IR and NMR (1H, 13C{1H}) spectral studies. The FAB-mass spectra of mono- (1), and di- (2), (6), (10) substituted products indicate their dimeric nature and that of tri- (3) and tetra- (4), (8) substituted derivatives suggest their monomeric nature. Crystal and molecular structure of [Ti{ONC 10H16}4·2CH2Cl2] (8A) suggests that the oximato ligands bind the metal in a dihapto η2-(N, O) manner, leading to the formation of an eight coordinated species. Thermogravimetric curves of (3), (6) and (10) exhibit multi-step decomposition with the formation of TiO2 as the final product in each case, at 900 °C. Low temperature (∼600 °C) sol-gel transformations of (2), (3), (4), (6), (7) and (8) yielded nano-sized titania (a), (b), (c), (d), (e) and (f), respectively. Formation of anatase phase in all the titania samples was confirmed by powder XRD patterns, FT-IR and Raman spectroscopy. SEM images of (a), (b), (c), (d), (e) and (f) exhibit formation of nano-grains with agglomer like surface morphologies. Compositions of all the titania samples were investigated by EDX analyses. The absorption spectra of the two representative samples, (a) and (f) indicate an energy band gap of 3.17 eV and 3.75 eV, respectively. © 2010 Elsevier Ltd. All rights reserved.

Polyhedron

Chemically modified oximato complexes of titanium(IV) isopropoxide as new precursors for the sol-gel preparation of nano-sized titania: Crystal and molecular structure of [Ti{ONC10H16}4· 2CH2Cl2]

Journal of Materials Chemistry

Chemical modification of titanium alkoxides for sol–gel processing

Transition Metal Chemistry

10.1023/a:1022901918955

Alkoxo and Aryloxo Derivatives of Metals

Introduction

Synthetic Studies and Structural Aspects of some Metallacyclic Derivatives of Titanium (IV) - Better Precursors for Titania

Journal	Advanced Materials Research
Publisher	Trans Tech Publications, Ltd.
ISSN	00194522
Open Access	0