01296nas a2200217 4500008004100000022001400041245013100055210006900186260011200255300001200367490000700379520042600386653002200812653001500834653002200849653002700871100001800898700002000916700001700936856012500953 2011 eng d a0019-452200aSynthesis and structural characterization of a solvated dimorph of a hydrazonato-oxovanadium(v) complex with [OV(mu-O)VO] core0 aSynthesis and structural characterization of a solvated dimorph  a5-A, NEW PALI RD, PO BOX 91, NEAR HOTEL TAJ HARI MAHAL, JODHPUR, 342 003, INDIAbSCIENTIFIC PUBL-INDIAcJUL a937-9410 v883 a

In this paper we report the synthesis and structural characterization of a different monoclinic variety of the title complex [V2O3(L)(2)], incorporating the doubly deprotonated benzoyl hydrazone of 5-chloro-2-hydroxyacetophenone (H2L) with P2(1)/c space group that showed some differences in bonding patterns in the solid state with respect to its another monoclinic variety with C2/c space group reported earlier.

10acrystal structure10adimorphism10ahydrazone complex10aOxovanadium(v) complex1 aMondal, Bipul1 aBanerjee, Rahul1 aGhosh, Tapas uhttps://library.ncl.res.in/content/synthesis-and-structural-characterization-solvated-dimorph-hydrazonato-oxovanadiumv-004003nas a2200349 4500008004100000022001400041245018200055210006900237260000800306490000700314520273100321653003003052653002203082653003003104653002703134653001203161653003003173653004903203653003703252653001703289100002303306700002003329700001803349700002003367700002303387700002403410700003103434700001603465700002503481700001703506856013003523 2017 eng d a1477-922600aExploring the effect of hydroxylic and non-hydroxylic solvents on the reaction of [(VO)-O-IV(beta-diketonate)2] with 2-aminobenzoyl-hydrazide in aerobic and anaerobic conditions0 aExploring the effect of hydroxylic and nonhydroxylic solvents on cSEP0 v463 a

Refluxing [(VO)-O-IV(beta-diketonate)(2)], namely [(VO)-O-IV(acetylacetonate)(2)] and [(VO)-O-IV(benzoylacetonate)(2)], separately with an equivalent or excess amount of 2-aminobenzoylhydrazide (ah) in laboratory grade (LG) CH3OH in aerobic conditions afforded non-oxidovanadium(IV) and oxidovanadium(V) complexes of the type [V-IV(L-1)(2)] (1), [(VO)-O-V(L-1)(OCH3)](2) (3) and [V-IV(L-2)(2)] (2), and [(VO)-O-V(L-2)(OCH3)] (4), respectively. (L-1)(2-) and (L-2)(2-) represent the dianionic forms of 2-aminobenzoylhydrazone of acetylacetone (H2L1) and benzoylacetone (H2L2), respectively, (general abbreviation, H2L), which was formed by the in situ condensation of ah with the respective coordinated [beta-diketonate] in medium-to-good yield. The yield of different resulting products was dependent upon the ratio of ah to [(VO)-O-IV(beta-diketonate)(2)]. For example, the yield of 1 and 2 complexes increased significantly associated with a decrease in the amount of 3 and 4 with an increase in the molar ratio of ah. Upon replacing CH3OH by a non-hydroxylic solvent, LG CHCl3, the above reaction yielded only oxidovanadium(V) complexes of the type [(VO)-O-V(L-1)(OH)](2) (5), [(VO)-O-V(L-2)(OH)] (6) and [(V2O3)-O-V(L)(2)] (7, 8) whereas, upon replacing CHCl3 by another non-hydroxylic solvent, namely LG CH3CN, only the respective [(V2O3)-O-V(L)(2)] (7, 8) complex was isolated in 72-78% yield. However, upon performing the above reactions in the absence of air using dry CH3OH or dry CHCl3, only the respective [V-IV(L)(2)] complex was obtained, suggesting that aerial oxygen was the oxidising agent and the type of pentavalent product formed was dependent upon the nature of solvent used. Complexes 3 and 4 were converted, respectively, to 7 and 8 on refluxing in LG CHCl3 via the respective unstable complex 5 and 6. The DFT calculated change in internal energy (Delta E) for the reactions 2[(VO)-O-V(L-2)(OCH3)] + 2H(2)O -> 2[(VO)-O-V(L-2)(OH)] + 2CH(3)OH and 2[(VO)-O-V (L-2)(OH)] -> [(V2O3)-O-V(L-2)(2)] + H2O was, respectively, +3.61 and -7.42 kcal mol(-1), suggesting that the [(VO)-O-V(L-2) (OH)] species was unstable and readily transformed to the stable [(V2O3)-O-V(L-2)(2)] complex. Upon one-electron reduction at an appropriate potential, each of 7 and 8 generated mixed-valence [(L) (VO)-O-V-(mu-O)-OVIV(L)]species, which showed valence-delocalisation at room temperature and localisation at 77 K. Some of the complexes showed a wide range of toxicity in a dose-dependent manner against lung cancer cells comparable with that observed with cis-platin.

10aEffective Core Potentials10aLung-cancer cells10aMolecular-Orbital Methods10aNon-oxido vanadium(iv)10aNon-Oxo10aOxovanadium(iv) Complexes10aTridentate ono ligand; Ray crystal-structure10aTrigonal-prismatic Co-ordination10aV-IV complex1 aBiswas, Nirmalendu1 aPatra, Debashis1 aMondal, Bipul1 aBera, Sachinath1 aAcharyya, Swarnali1 aBiswas, Anup, Kumar1 aMukhopadhyay, Titas, Kumar1 aPal, Amrita1 aDrew, Michael, G. B.1 aGhosh, Tapas uhttps://library.ncl.res.in/content/exploring-effect-hydroxylic-and-non-hydroxylic-solvents-reaction-vo-o-ivbeta-diketonate2-2