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Schmid VED, Brosa B. Raman-Intensität und Konjugation I. Substituentenabhängigkeit der Raman-Intensitäten der 1600 cm−1-Ringschwingungen monosubstituierter Benzolderivate. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.197100013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Egorochkin AN, Razuvaev GA. The σ Constants of Substituents Containing Silicon Subgroup Elements. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1987v056n09abeh003309] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13C-NMR Based Evaluation of the Electronic and Steric Interactions in Aromatic Amines. Int J Mol Sci 2005. [DOI: 10.3390/i6010052] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Martin D, Brause W, Radeglia R. Struktur-Reaktivitätsuntersuchungen mit heterosubstituierten Nitrilen. II. H-Brückenwechselwirkungen zwischen OH-Protonendonatoren und Cyanverbindungen Korrelationen. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19703120510] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kliegel W, Lubkowitz G, Pokriefke JO, Rettig SJ, Trotter J. Formation of heterocyclic arylboronates by thermally induced 1,4-aryl migration in diarylboron chelates of C-(1-hydroxyalkyl)nitrones. Crystal and molecular structures of some of the rearrangement products and of one of the educts. CAN J CHEM 2001. [DOI: 10.1139/v01-002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Synthesis of heterocyclic arylboronates has been carried out by thermally induced rearrangement of diarylboron chelates of C-(1-hydroxyalkyl)nitrones. The structures have been determined from spectroscopic data and from X-ray analyses. Thermoanalytical and time-dependent NMR measurements give information on the nature of the isomerization reaction. Crystal data (at 293 K for 2j, 180 K for the others): 1m, monoclinic, P21/n, a = 14.059(3), b = 12.5531(13), c = 14.8531(6) Å, β = 95.8067(12)°, Z = 4; 2j, triclinic, [Formula: see text]1, a = 10.4729(11), b = 13.5896(11), c = 9.5803(7) Å, α = 104.764(6), β = 103.279(7), γ = 107.278(7)°, Z = 2; 2m, monoclinic, P21/n, a = 14.9442(13), b = 11.990(2), c = 16.0613(4) Å, β = 114.0153(7)°, Z = 4; 9, monoclinic, P21/n, a = 11.123(2), b = 18.433(3), c = 13.4852(4) Å, β = 108.2075(7)°, Z = 4. The structures were solved by direct methods and refined by full-matrix least-squares procedures to R(F, I [Formula: see text] 3σ(I)) = 0.036, 0.052, 0.043, and 0.040, respectively, for AFC6 data for 2j and CCD data for 1m, 2m, and 9. All four molecules contain six-membered OBONCC rings, with an approximately planar ON=CC segment in the educt 1m and approximately planar OBOC segments in the rearrangement products. A probable transition state geometry is derived for the isomerization process.Key words: diarylboron chelates, C-(1-hydroxyalkyl)nitrones, heterocyclic arylboronates, organoboron compounds, rearrangement, crystal structures.
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Selke R, Schwarze M, Baudisch H, Grassert I, Michalik M, Oehme G, Stoll N, Costisella B. Carbohydrate phosphinites as chiral ligands for asymmetric syntheses catalyzed by complexes. Part X. Importance of all-equatorial arrangement in vicinal bisphosphinite hexapyranoside ligands for rhodium catalyzed asymmetric hydrogenation. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0304-5102(93)85056-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Electronic Effects of Heteroaromatic and Substituted Heteroaromatic Groups. ADVANCES IN HETEROCYCLIC CHEMISTRY 1987. [DOI: 10.1016/s0065-2725(08)60642-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Gruner M, Pfeifer D, Becker HGO, Radeglia R, Epperlein J. 15N- und13 C-NMR-chemische Verschiebungen sowie13C-1H-,13C-15N- und15N-15N-Spin-Spin-Kopplungskonstanten para-substituierter Benzendiazoniumsalze. ACTA ACUST UNITED AC 1985. [DOI: 10.1002/prac.19853270109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kliegel W, Ahlenstiel E. Synthese und thermisch induzierte umlagerung der diarylborchelate von N-(2-hydroxyalkyl)-N,N-dialkylamin-N-oxiden. J Organomet Chem 1984. [DOI: 10.1016/0022-328x(84)80698-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hofmann H, Hofmann P. Heterocyclische Siebenring-Verbindungen, XVIII. Einfluß der Substituenten auf die photochemische 1-Benzoxepin-Umlagerung. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/jlac.197719771003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Förster H, Vögtle F. Sterische Wechselwirkungen in der organischen Chemie: Der Raumbedarf von Substituenten. Angew Chem Int Ed Engl 1977. [DOI: 10.1002/ange.19770890705] [Citation(s) in RCA: 69] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kliegel W, Becker H. Ring-Ketten-Isomerie beiN-(2-Hydroxyalkyl)nitronen, I Substituierte Benzaldehyd-nitrone. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/cber.19771100605] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kliegel W, Ahlenstiel E. Bor-Stickstoff-Betaine mit bicyclischer („Käfig”) Struktur. ACTA ACUST UNITED AC 1977. [DOI: 10.1002/cber.19771100505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hofmann H, Hofmann P. Heterocyclische Siebenring-Verbindungen, XIV. Diels-Alder-Reaktionen substituierter 1-Benzoxepine. ACTA ACUST UNITED AC 1975. [DOI: 10.1002/jlac.197519750904] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dulenko VI, Alekseev NN, Chekushin SI, Rybachenko VI. IR spectra of selenophenopyrylium salts. Chem Heterocycl Compd (N Y) 1973. [DOI: 10.1007/bf00470340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Gr�ndler W, Sch�dler HD. Sigma-induktive Effekte im Rahmen der Omega-HMO-(Pi+Sigma)-Methode. MONATSHEFTE FUR CHEMIE 1973. [DOI: 10.1007/bf00911162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dieck HT, Renk IW. Zur Komplexchemie von Vierzentren-π-Systemen, VI. Die „π-Rückbindung”: Reduktionspotentiale von 1.4-Diheterobutadien-molybdän-tri- und -dicarbonylen. ACTA ACUST UNITED AC 1972. [DOI: 10.1002/cber.19721050434] [Citation(s) in RCA: 41] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Meissner B, Staab HA. Sterisch behinderte Diarylborane:1H-NMR-Untersuchungen zur Rotation um Kohlenstoff-Bor-Bindungen. ACTA ACUST UNITED AC 1971. [DOI: 10.1002/jlac.19717530108] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gey E. Halbempirische MO-LCAO-Berechnungen an substituierten Styrolen. I. NMR-Verschiebungen, Dipolmomente, Ionisierungspotentiale und Elektronenspektren. ACTA ACUST UNITED AC 1970. [DOI: 10.1002/prac.19703120513] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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