Darstellung und NMR-spektroskopie organometallisch substituierter dikobalthexacarbonyl-alkin-komplexe

Galow, Peter; Sebald, Angelika; Wrackmeyer, Bernd

doi:10.1016/0022-328x(83)87175-7

Cited by 32 publications

(14 citation statements)

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“…[10,11] Here, we report that 1b reacts with BEt 3 to afford the stannole 2b. Reactions of the stannoles 2a and 2b with isocyanates were explored and some properties of the products were studied.…”

Section: Introductionmentioning

confidence: 93%

“…As reported earlier, [10] diethynyl(diphenyl)stannane 1b can be prepared from the reaction of the diphenyltin dichloride with two equiv. of ethynylmagnesium bromide in thf (Scheme 2).…”

Section: Diethynyl(diphenyl)stannane 1bmentioning

confidence: 99%

“…(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) viously in low yield [10] and its reaction with dicobaltoctacarbonyl Co 2 (CO) 8 has been studied. [10,11] Here, we report that 1b reacts with BEt 3 to afford the stannole 2b.…”

Section: Introductionmentioning

confidence: 99%

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Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

2009

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Diethynyl(diphenyl)stannane was prepared, fully characterised in solution and in the solid state, and its reaction with triethylborane, BEt3, afforded 3‐(diethylboryl)‐4‐ethyl‐1,1‐diphenyl‐stannole in essentially quantitative yield. Treatment with isocyanates converted this stannole and the known analogous 1,1‐dimethyl derivative into novel bicyclic compounds containing an aminoborane unit. These reactions were found to proceed diastereoselectively, again in essentially quantitative yield. The bicyclic compounds react with methanol through rearrangement and elimination of ethyl(dimethoxy)borane to give novel 1‐stannacyclopent‐3‐ene derivatives, one of which could be structurally characterised by X‐ray analysis. All final products and intermediates were studied in solution by multinuclear NMR spectroscopy (1H, 11B, 13C, 119Sn NMR).(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

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Section: Introductionmentioning

confidence: 93%

“…As reported earlier, [10] diethynyl(diphenyl)stannane 1b can be prepared from the reaction of the diphenyltin dichloride with two equiv. of ethynylmagnesium bromide in thf (Scheme 2).…”

Section: Diethynyl(diphenyl)stannane 1bmentioning

confidence: 99%

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Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

2009

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“…The molecular structure of 9 was confirmed by an X-ray diffraction analysis (see below). There are only a few acetyleneϪCo 2 (CO) 6 complexes with boron groups attached to the acetylene unit, [11] and two [11b,11c] structurally characterized examples carry BϪcat groups (cat ϭ catechol). The C 4 B 2 ϪC 2 B 10 linked cluster 10 (Scheme 4) is produced by the reaction of 1 with monolithio-o-carborane, in which the C 4 B 2 cluster is directly connected to the icosahedral o-carborane by a B6ϪC bond, as confirmed by Xray diffraction analysis.…”

Section: Cluster Linkagesmentioning

confidence: 99%

“…In the Et 3 N/ H 2 O reaction (Scheme 5), the formed by-product ammonium salt [Et 3 NH]I, was identified by FAB-MS. Compound 12 was characterized by 11 B NMR spectroscopy (δ ϭ 22.1 and Ϫ51.9 ppm) and HR-MS which exhibits the molecular ion peak with the correct isotopic pattern.…”

Section: Cluster Linkagesmentioning

confidence: 99%

Reactivity Studies on 2,3,4,5‐Tetraethyl‐1,6‐diiodo‐2,3,4,5‐tetracarba‐nido‐hexaborane(6): Synthesis and Structures of New C₄B₂nido‐Carborane Derivatives

2004

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Keywords: Boron / Carboranes / Nucleophilic substitution / Iron / CobaltThe reactivity of the title compound 2,3,4,5-tetraethyl-1,6-diiodo-2,3,4,5-tetracarba-nido-hexaborane(6) (1) towards a variety of nucleophiles is reported. When 1 is treated with RC 2 Li (R = Ph, tBu, SiMe 3 , p-tolyl) and Ph 2 PLi, the corresponding new C 4 B 2 nido-carborane derivatives 2a−d and 3, respectively, are obtained by selective substitution at the basal B−I group, whereas the apical B−I bond remains inert. The reaction of 1 with K[(η 5 -C 5 H 5 )Fe(CO) 2 ] affords the novel species 4, which contains a CpFe(CO) 2 fragment σ-bonded to the basal boron atom of the C 4 B 2 cluster. Attempts to isolate 4 by chromatography on silica gel led to cleavage of the Fe−B bond and formation of compound 5, containing a basal BH vertex, which can be separately prepared by the reaction of 1 and LiBEt 3 H. In the reactions of 1 with PhLi and Me 3 SnLi, respectively, 6a and 7a are formed as the predominant B6-substituted carborane products. In addition, trace amounts of

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Synthesis and Reactivity of Monoborylacetylene Derivatives

Pritzkow

Siebert

2001

Eur. J. Inorg. Chem.

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The catechol‐substituted monoborylacetylenes 1a−d are obtained from the reaction of bis(diisopropylamino)borylacetylene with catechol derivatives and 2,2′‐biphenol. The catalytic trimerization of 1a−d with [(η5‐C5H5)Co(CO)2] yields isomeric mixtures of the triborylbenzene derivatives 2a,2a′, 2b,2b′, and 2c,2c′. The reaction of 2a,2a′ with mesityllithium provides the hexamesityl‐substituted 1,3,5‐triborylbenzene 2e. Hydroboration of 1a with catecholborane affords a mixture of 1,1‐bis(1,3,2‐benzodioxaborol‐2‐yl)ethene (3a) and trans‐1,2‐bis(1,3,2‐benzodioxaborol‐2‐yl)ethene (4a). Hydroboration of 1a and 3a with one or two mol of HBCl2 and subsequent substitution of the chlorine atoms of the product with catechol leads in each case to the 1,1,1‐trisborylmethane derivative 5a in 83 and 78% yield, respectively, which forms the tris(THF) adduct 5a(thf)3. Treatment of 5a with tBuLi yields 1,1,1‐tris[di(tert‐butyl)boryl]ethane 6a. [Co2(CO)8] reacts with 1a to give 3‐(1,3,2‐benzodioxaborol‐2‐yl)‐1,2‐bis(tricarbonylcobalta)tetrahedrane (9a). The new compounds have been characterized by NMR spectroscopy and mass spectrometry as well as by X‐ray structure analyses for 1a, 3a, 5a, 5a(thf)3, and 9a.

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Darstellung und NMR-spektroskopie organometallisch substituierter dikobalthexacarbonyl-alkin-komplexe

Cited by 32 publications

References 19 publications

Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

Reactivity Studies on 2,3,4,5‐Tetraethyl‐1,6‐diiodo‐2,3,4,5‐tetracarba‐nido‐hexaborane(6): Synthesis and Structures of New C₄B₂nido‐Carborane Derivatives

Synthesis and Reactivity of Monoborylacetylene Derivatives

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Darstellung und NMR-spektroskopie organometallisch substituierter dikobalthexacarbonyl-alkin-komplexe

Cited by 32 publications

References 19 publications

Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

Reactions of 3‐(Diethylboryl)stannoles with Isocyanates

Reactivity Studies on 2,3,4,5‐Tetraethyl‐1,6‐diiodo‐2,3,4,5‐tetracarba‐nido‐hexaborane(6): Synthesis and Structures of New C4B2nido‐Carborane Derivatives

Synthesis and Reactivity of Monoborylacetylene Derivatives

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Reactivity Studies on 2,3,4,5‐Tetraethyl‐1,6‐diiodo‐2,3,4,5‐tetracarba‐nido‐hexaborane(6): Synthesis and Structures of New C₄B₂nido‐Carborane Derivatives