Erste Kristallstruktur eines Selenans; Metall(II)‐Komplexe mit dem 2,4,6‐Tris(trifluormethyl)selenophenolat‐Liganden

Labahn, Dieter; Bohnen, Frank M.; Herbst‐Irmer, Regine; Pohl, Ehmke; Roesky, Herbert W.

doi:10.1002/zaac.19946200107

Cited by 40 publications

(16 citation statements)

References 25 publications

(4 reference statements)

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“…There are two derivatives of the general formula [Pb 2 M 3 ]' 2 , where Μ is a chalcogen, Se [160] orTe [161], and these are isostructural ( [82,85,102,[162][163][164][165][166], or two N-donor ligands [167], two S-donor ligands [168][169][170][171], two P-donor ligands [172,173] or two Se-donor ligands [174], Distorted edge-shared trigonal [167][168][169][172][173][174], tetrahedra [102,162,163,166], trigonal bipyramidal [85]. pseudo-octahedral [164,165] and heptahedral [82,170,171] are observed.…”

Section: 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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Section: 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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“…Initial experiments indicate however, that the diarylgermylene (Rr)2Ge might be isolable. in high yields [22]. At room temperature (Rr)2Ge seems to be thermally labile and further experiments are necessary in order to elucidate the chemical nature and reactivity pf this diarylgermylene [20].…”

Section: B) Germanium Derivativesmentioning

confidence: 99%

“…The bright yellow color is virtually unchanged between -196 "C and the melting point. According to a recent X-ray structure determination it is dimeric in the solid state and thus has to be formulated as [(RFSe)2Pb]2 [22]. A single crystal X-ray structure analysis revealed that (RF)2Pb is monomeric in the solid state (Fig.…”

Section: D) Lead Derivativesmentioning

confidence: 99%

THE ROLE OF 2,4,6-TRIS(TRIFLUOROMETHYL)PHENYL SUBSTITUENTS IN THE STABILIZATION OF LOW-COORDINATE Sn AND Pb COMPOUNDS

Edelmann¹

1994

Main Group Metal Chemistry

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The easily accessible 2,4,6-tris(trifluoromethyl)phenyl substituent (= Rr ) is shown to be an ideally suited ligand for the stabilization of low-coordinate tin and lead compounds. This ligand allows the preparation of a stable diarylstannylene, (RR)2Sn, as well as the first stable diaryl lead(II) compound, (RF)2Pb. The tin(II) species (RR)2Sn exhibits a rich derivative chemistry. Cycloaddition reactions with various heterocumulenes (ketenes, thioketenes, keteneimines) have been investigated.(RF)2Sn reacts with the stable phosphaalkyne 1 BuCP to give a 1:1 adduct containing a three-membered phosphastannirene ring system. Tin(IV) compounds containing the RF ligand are obtained when (RF )2Sn is treated with Cl2 , XeF2 , AsFs , S4 N4 , (CF3)2NO and 3,5-di-tbutyl-o-benzoquinone. Treatment of (RF)2SnF2 with (Me3Si)20 results in the formation of trimeric [(RF)2SnO]3. In contrast to the diarylstannylene, (RF)2Pb is significantly less reactive. The unsolvated lead!II) thiolate (RFS)2Pb has been obtained by treatment of (RP)2Pb with RFSH. The formation and structural characterization of the unusual lead thiolate cluster Pbs0(SRF)s·2C7He is reported.

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“…17, 18 Both compounds are chalcogenolates of divalent lead with an electron sextett and a resulting electron deficiency. Due to the steric bulk of the substituents they are nevertheless monomeric molecules which are sublimable 17 and show a good stability in polar organic solvents.…”

Section: General Aspectsmentioning

confidence: 99%

“…Preparation of 2,4,6-tris(trifluoromethyl)selenophenol 17 In a 100 mL-Schlenk flask 5.00 g (17.7 mmol) of 2,4,6tris(trifluoromethyl)benzene were dissolved in 27 mL of diethylether and cooled to -78 • C. 11.1 mL of butyllithium (1.6 M in hexane, 17.7 mmol) were added dropwise and it was stirred for 30 min while the solution was allowed to warm to room temperature. A slight excess of selenium (1.68 g, 21 mmol) was added and stirring was continued for 6 h. Subsequently tetrafluoroboric acid in diethylether (17.7 mmol HBF 4 ) was syringed into the reaction mixture and stirring was continued overnight under exclusion of light.…”

Section: Preparation Of Tris(trimethylsilyl)silyltellurolmentioning

confidence: 99%

Polymer-assisted preparation of nanoscale films of thermoelectric PbSe and PbTe and of lead chalcogenide-polymer composite films

et al. 2010

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Polymer films of polyethyleneoxide (PEO) or poly(L-lactide) (PLLA) containing a single-source precursor for either PbSe or PbTe were used to produce films of nanoparticles of these thermoelectric materials. The monomeric homoleptic chalcogenolates lead(II) bis-(2,4,6-trifluoromethylphenylselenolate) Pb[SeC(6)H(2)(CF(3))(3)](2) and lead(II) bis-[tris(trimethylsilyl)silyl-tellurolate] Pb[TeSi(SiMe(3))(3)](2) were used as single-source precursors for the thermolytic formation of the lead chalcogenides. The thickness and the quality of as-obtained thin films depended decisively on the spin-coating conditions, on the polymer, on the precursor concentration in the composite film before thermolysis and on the annealing time. Thin layers of particles of 30-50 nm size and high crystallinity were obtained. They were characterized by X-ray diffraction, thermal analysis and electron microscopy.

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Erste Kristallstruktur eines Selenans; Metall(II)‐Komplexe mit dem 2,4,6‐Tris(trifluormethyl)selenophenolat‐Liganden

Cited by 40 publications

References 25 publications

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

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

THE ROLE OF 2,4,6-TRIS(TRIFLUOROMETHYL)PHENYL SUBSTITUENTS IN THE STABILIZATION OF LOW-COORDINATE Sn AND Pb COMPOUNDS

Polymer-assisted preparation of nanoscale films of thermoelectric PbSe and PbTe and of lead chalcogenide-polymer composite films

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