New oligomeric structures of barium dipivaloylmethanate, Ba4(thd)8, and its pivalate derivative Ba5(thd)9(piv)

Дроздов, А. А.; Trojanov, S.

doi:10.1016/s0277-5387(00)83590-1

Cited by 65 publications

(20 citation statements)

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“…1 and selected structural parameters are collected in Table 1. Crystallographic studies show that the complex has a polymeric large ring structure with a repeating unit [Ba 6 (Phen) 12 Each of the Ba(1) and Ba(3) centres is coordinated to two Phen ligands, one N from the CN group of the [Fe(CN) 6 ] 3− anion, two oxygen atoms of two bridging trifluoroacetates and one water molecule. Each Ba centre thus achieves an 8-fold coordination with distorted cubic geometry.…”

Section: Crystal Structurementioning

confidence: 99%

“…Thermal investigation was carried out on a Shimadzu TGA-50 thermal analyzer under a dynamic nitrogen environment. 6 (Phen) 12 (CF 3 COO) 6 {Fe(CN) 6 …”

Section: Physical Measurementsmentioning

confidence: 99%

“…In this contribution we report the synthesis, IR 0932-0776 / 05 / 0600-0640 $ 06.00 c 2005 Verlag der Zeitschrift für Naturforschung, Tübingen · http://znaturforsch.com spectrum, thermal analysis and X-ray crystal structure of a chain and 24-membered ring polymeric bariumiron complex { [Ba 6 (Phen) 12 (CF 3 COO) 6 {Fe(CN) 6 } 2 (H 2 O) 8 ]·6H 2 O} n (1) (Phen = 1,10-phenanthroline) containing simultaneously cyano and trifluoroacetato bridges.…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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A New Polymeric Barium-Iron (III) Complex with Chain and Large Ring Structure

Karan

Samanta

Mitra

et al. 2005

Zeitschrift Für Naturforschung B

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The compound { [Ba 6 (Phen) 12 (CF 3 COO) 6 {Fe(CN) 6 } 2 (H 2 O) 8 ]·6 H 2 O} n (1) (Phen = 1,10-phenanthroline) has been synthesized and structurally characterized. In the crystal structure, the two consecutive Ba centres are bridged through trifluoroacetate groups and also via cyano groups of [Fe(CN) 6 ] 3− and form the zigzag chain resulting the formation of 24-membered ring structure. The Ba-centres are 8-fold coordinated with distorted cubic geometry. Six H 2 O molecules per asymmetric unit remain in the structure without any direct interaction with the metal atoms but they act in hydrogen bond formation.

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Section: Crystal Structurementioning

confidence: 99%

“…Thermal investigation was carried out on a Shimadzu TGA-50 thermal analyzer under a dynamic nitrogen environment. 6 (Phen) 12 (CF 3 COO) 6 {Fe(CN) 6 …”

Section: Physical Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

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A New Polymeric Barium-Iron (III) Complex with Chain and Large Ring Structure

Karan

Samanta

Mitra

et al. 2005

Zeitschrift Für Naturforschung B

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“…. Ba distances in each tetranuclear species are : 4.184 2 (4.199 to chelating bridging coordination mode (signed lb in [2] The complexes with pta mentioned are suggested as precursors for MO CVD process of thin films production. In comparison with water barium thd-chelates (usually a mixture of different unstable products formes during storage) in H20-Ba(ptaI2 system only one stable compound is formed -monohydrate.…”

Section: Introductionmentioning

confidence: 99%

New Barium Volatile Complexes Useful in CVD

et al. 1995

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Trends in precursor design for conventional and aerosol-assisted CVD of high-Tc superconductors

Hubert‐Pfalzgraf

Guillon

1998

Appl. Organometal. Chem.

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Conventional MOCVD techniques require molecules displaying volatility and constant vapor pressure. Metal oxide precursors, i.e., β‐diketonates, or classical or functionalized metal alkoxides are mostly solids. The various approaches used to tailor volatility are discussed with barium derivatives as an example. The relationships between sublimation temperature and molecular weight suggest that volatility can be optimized on the basis of molecular weight. Aerosol‐assisted CVD (AACVD) can use a larger range of precursors since volatility is no longer crucial. The solvent is an undesired ballast in a CVD process. High solubility of the precursors in the selected solvent is thus desirable. ‘Stability’ here includes the absence of precipitation which would change the stoichiometry of the feed solution for multicomponent oxides. Precipitation is often promoted by hydrolysis; stability toward moisture is thus desirable. The use of mixtures of precursors based on different ligands (β‐diketonates, β‐ketoesterates, alkoxides) can lead to ligand exchange reactions giving homometallic species, sometimes of low solubility, or mixed‐metal species by self‐assembly, thus improving solubility and stability toward moisture. These aspects are illustrated in compositions related to high‐Tc superconductors. Novel copper, yttrium, cerum(IV), barium‐copper, yttrium‐copper and praseodynium‐copper species are reported. © 1998 John Wiley & Sons, Ltd.

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New oligomeric structures of barium dipivaloylmethanate, Ba4(thd)8, and its pivalate derivative Ba5(thd)9(piv)

Cited by 65 publications

References 5 publications

A New Polymeric Barium-Iron (III) Complex with Chain and Large Ring Structure

A New Polymeric Barium-Iron (III) Complex with Chain and Large Ring Structure

New Barium Volatile Complexes Useful in CVD

Trends in precursor design for conventional and aerosol-assisted CVD of high-Tc superconductors

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