Crystal and molecular structure of di(para-nitrobenzoato)diaquolead

Усубалиев, Б. Т.; Amirov, A. S.; Амирасланов, И. Р.; Mamedov, Kh. S.

doi:10.1007/bf00763815

Cited by 5 publications

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“…The concentration of oxygen O(1s) could not be unambiguously determined because of the overlap by the oxygen signal originating from the glass support. We note that copper undergoes fast reduction under the experimental conditions. − …”

Section: Resultsmentioning

confidence: 82%

“…We note that copper undergoes fast reduction under the experimental conditions. [16][17][18][19] The C(1s) broad peak around 288.3 eV (Figure 2) originates from the carboxylate anion (-COO -) line at 288.5 eV, the amide group's ketone (-CONH-) at 288.0 eV and the carboxylic acid (-COOH) at 289.0 eV when present. 20 A lower intensity at ∼289.4 eV is observed in curves (c) and (d) (Figure 2), indicating an induction in ionic character of the carboxylate group, -COOH f -COO -.…”

Section: Resultsmentioning

confidence: 99%

“…A flood gun was used to compensate extra charges, whereas the signal energy calibrated as centered to the C(1s) line at 284.8 eV. To eliminate beam-induced damage, − we have used repetitive measurements, which presented the evaluation at the damage on time scales up to 6−9 h. These studies showed different time constants for different mechanisms, the shortest regards reduction of the Cu 2+ ions on a scale of a few (∼10) minutes. Eventually, the damage-free spectra were recorded on fresh areas at relatively fast scans.…”

Section: Methodsmentioning

confidence: 99%

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Self-Assembly of Bolaamphiphiles Forming Alternating Layer Arrangements with Lead and Copper Divalent Ions

et al. 2001

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Five bifunctional α-amino acid-ε-carboxy bolaamphiphiles [(2-R,S, or RS)−(HOOC)−(CH2)m-CONH−(CH2) n -CH(COOH)(NH2) m=20,22, n=3,4 labeled (l), (d,l)-C22Orn (l), (d), (d,l)-C22Lys, (d,l)-C24Lys respectively] were synthesized. These molecules were deposited on different aqueous subphases, and studied by means of grazing incidence X-ray diffraction (GIXD). On deionized water, the bolaamphiphiles (d,l)-C22Lys yield a mixture of crystallites: both a monolayer, in which the chains are tilted from the normal, and a multilayer in which the molecules lie parallel to the water. On the other hand, when deposited on mono- or bi-metal ionic subphases, they self-assemble into crystalline multilayer films in which the molecules lie parallel to the aqueous solution surface, linked head-to-head and tail-to-tail in the form of extended chains. The latter are juxtaposed such that the metal ions form sheets separated by the organic molecules, aligned perpendicular to the plane of the aqueous solution. Deposition of either the enantiomerically pure or racemic bifunctional bolaamphiphiles on an aqueous solution of mixed Cu(Acetate)2 and Pb(Acetate)2, yields self-assembled crystalline films composed of the two different metal cations, arranged in alternating sheets, separated by the organic spacer. Both GIXD and X-ray-photoelectric-spectroscopy (XPS) studies (after deposition on solid support) demonstrate that the structures of these films differ form the ones formed on either pure Pb(Ac)2 or on Cu(Ac)2 solutions, thus excluding the simultaneous formation of the two monometallic crystalline phases.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Self-Assembly of Bolaamphiphiles Forming Alternating Layer Arrangements with Lead and Copper Divalent Ions

et al. 2001

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“…A colourless derivative [Pb(apy) 6 ](CI0 4 ) 2 [95] has a Pb(ll) atom surrounded by six antipyrine oxygen atoms in a slightly distorted octahedral environment, with Pb-0 bond distances of 244.6(16) pm. In another derivative [96] the PbO e core is built up from two anisobidentate 4nitrobenzoate anions and by two water molecules. …”

Section: Coordination Number Six 251 Lead(ll) Compoundsmentioning

confidence: 99%

Lead Coordination and Organometallic Compounds: Classification and Analysis of Crystallographic and Structural Data

Holloway¹,

Melnı́k²

1997

Main Group Metal Chemistry

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This review covers over three hundred and sixty coordination and organometallic complexes of lead. About 20% of these contain lead in its +4 oxidation state, of which one fifth are dilead(+6) units, and two are anionic clusters. The Pb(IV) derivatives are predominantly organometallic, many stabilized by sandwich ligation. The majority of the Pb(ll) compounds are typical coordination complexes. Mon-to polynuclear derivatives are found, with coordinations numbers from 2 to 12. The effect of the non bonded pair of valence electrons is observed in lower coordination number Pb(ll) complexes. Examples of distortion, geometric and coordination isomerism are observed. Factors affecting bond lengths and bond angles are discussed, and some ambiguities in coordination polyhedra are outlined.

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“…2 shows the packing. A comparison of compound (I) with the related compounds mentioned above indicates that the Pb 2÷ cation forms a monomeric structure with p-nitrobenzoic acid (Usubaliev et al, 1989), but a dimeric structure with phydroxybenzoic acid (Dzhafarov et al, 1981). The crystal structure of aquabis(salicylato)lead(II) (Usubaliev et al, 1987) consists of polymeric helices.…”

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confidence: 99%

Aquabis(p-nitrosalicylato-O,O')lead(II)

Tahir¹,

Ülkü²,

Mövsümov³

1996

Acta Crystallogr C

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Table 2. Selected geometric parameters (A, (Received I November 1995; accepted 30 May 1996) AbstractIn the crystal structure of the title compound, [Pb-(C7H4NO5)2(H20)], the sevenfold coordination around the Pb atom consists of four O atoms from two chelating carboxylate groups, one water O atom and two additional O atoms belonging to a carboxyl and a hydroxy group of neighbouring molecules. The Pb---O distances are in the range 2.419 (4)-3.084 (5) A, the shortest distance being to a water O atom. Two intramolecular and two intermolecular hydrogen bonds are also observed in the polymeric structure.f Present address:

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Crystal and molecular structure of di(para-nitrobenzoato)diaquolead

Cited by 5 publications

References 0 publications

Self-Assembly of Bolaamphiphiles Forming Alternating Layer Arrangements with Lead and Copper Divalent Ions

Self-Assembly of Bolaamphiphiles Forming Alternating Layer Arrangements with Lead and Copper Divalent Ions

Lead Coordination and Organometallic Compounds: Classification and Analysis of Crystallographic and Structural Data

Aquabis(p-nitrosalicylato-O,O')lead(II)

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