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Synthesis, spectral characterization and crystal structure of a new precursor [(CH3COCHCOCH3)2Zr{C6H4(N=CHC6H4O)2}] for nano-zirconia: an investigation on the wettability of polyvinylidene fluoride–nano-zirconia composite material

“…Schiff ' s base (L) ligand was prepared by the reaction of o-phenylene diamine with salicylaldehyde in a 1:2 molar ratio in refluxing methanol [32]. Zirconium was analyzed gravimetrically as ZrO 2 [33] and liberated isopropanol was estimated by iodometric titration [34]. The melting point was observed on an Elchem digital melting point apparatus.…”

Wet-chemical synthesis of crystalline BaTiO3 from stable chelated titanium complex: Formation mechanism and dispersibility in organic solvents

“…In addition, the Ti-acac complexes formed by using acetylacetone with Hacac/Ti = 1.0 and 2.0 in the molar ratio were found to be relatively less stable in an aqueous medium as compared to that prepared by using Hacac/Ti molar ratio = 3.0. It was observed that the Ti-acac complexes (using Hacac/Ti molar ratio = 2.0) were slowly transformed to gel-like products after addition of water, which might be due to the formation of dimeric species, Ti 2 (acac) 4 O 2 by the hydrolysis of the Ti-acac complexes [33,34]. Again, an excess of aqueous NaClO 4 solution was added into the Ti-acac complexes solution (Hacac/Ti 1428, 1370, 1277, and 1026 were assigned to ν C-H , ν C=O , ν C-C , ν C-O , δ CH 3 , ν C-CH 3 respectively [35,36].…”

Synthetic Studies and Structural Aspects of Some Metallacyclic Compounds of Germanium(IV) Incorporating Nitrogen, Oxygen and Sulfur: 1. Reactions of Germanium(IV) isopropoxide with diols and crystal structure of a diolato bridged germanium(IV) compound [Ge2(O2C2H4)4]

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Of the alkoxy-and glycoxy derivatives of tetravalent elements (group14 as well as 4) which have been extensively studied 1-2 from spectroscopic as well as structural points of view, those of germanium have received much less attention. Although penta [3][4][5][6] and hexa 7-10 coordinated derivatives of even germanium with complex organic moieties have been reported, the alkoxy derivatives generally prefer a tetracoordinated structure [11][12][13][14] even with alkoxyalkanols as shown in a recent publication. 14 In this paper, a crystallographically characterised pentacoordinate diolate bridged derivative, [Ge 2 (O 2 C 2 H 4 ) 4 ], is being reported for the first time as part of a detailed physicochemical study of the diolate derivatives of germanium(IV).

Results and discussionReactions of Ge(OPr i ) 4 with a variety of glycols in 1:1 and 1:2 molar ratios in anhydrous benzene yield the compounds (OPr i ) 2 Ge(O-G-O) (1, 3, 5, 7, 9) or Ge(O-G-O) 2 (2, 4, 6, 8, 10), respectively.

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