481. Infrared spectra of boron compounds

Bellamy, L. J.; Gerrard, W.; Läppert, Michael F.; Williams, R. L.

doi:10.1039/jr9580002412

Cited by 82 publications

(34 citation statements)

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“…The IR spectra of homopolymers (PSt, PStB(OH) 2 ) in the region of 450 to 3600 cm À1 are shown in Fig. 4 2 it is in agreement with spectra published by Sezgin et al [34,35] The most important peaks that confirmed the chemical structure of boronated PSts are the peaks assigned to the vibration of B-O (1325 cm…”

Section: Structural Characterization Of the Copolymerssupporting

confidence: 82%

“…Monomer reactivity ratios are determined parameters in this relationship. [35] Reactivity ratio values may be evaluated by various procedures: linear procedures, nonlinear procedures and other copolymer composition equations. [36] In this work the monomer reactivity ratios of StBcyclo and St were determined by the Jaacks method described in details in Experimental part 2.6.…”

Section: Molecular Weight Of the Polymersmentioning

confidence: 99%

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Boronated (co)polystyrene: monomer reactivity ratios, thermal behavior and flammability

Wiacek

Wesołek

Rojewski

et al. 2014

Polymers for Advanced Techs

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Chemical modification based on incorporation of flame retardants (FR) into the polymer backbone was used in order to reduce polystyrene flammability. Boronated styrenes such as 4-vinylphenylboronic acid (StB(OH) 2 ) and 6-methyl-2-(4-vinylphenyl)-1,3,6,2-dioxazaborocane-4,8-dione (StBcyclo) were applied as reactive FR. Homo-and copolymers of boronated styrenes and styrene (St) were synthesized with different feed ratios using free radical polymerization. It yielded in series of (co)polymers with various amounts of StB(OH) 2 and StBcyclo (5-20% mol/mol of St). Copolymer compositions were determined by 1 H NMR. The relative reactivity ratios of system St-StBcyclo were determined by applying the Jaacks method. Glass transition temperature and thermal stability of obtained (co)polymers were determined from DSC and TGA analysis, respectively. The pyrolysis combustion flow calorimeter was applied as a tool for assessing the flammability of the synthesized (co)polymers.

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Section: Structural Characterization Of the Copolymerssupporting

confidence: 82%

Section: Molecular Weight Of the Polymersmentioning

confidence: 99%

Boronated (co)polystyrene: monomer reactivity ratios, thermal behavior and flammability

Wiacek

Wesołek

Rojewski

et al. 2014

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Though the molecule 1 has been known for a long time, IR spectra of 1 were recorded only in the limited (3500-400 cm À1 ) spectral range [23][24][25]. The earlier assignments of the observed bands mainly concerned middle range where B-H stretching modes and displacement of B-H ex -B bridges can be found.…”

Section: Vibrational Spectra Of Nido-b 10 H 14mentioning

confidence: 99%

The electronic structure of nido-B10H14 and [6-Ph-nido-6-CB9H11]− in terms of Bader’s theory (AIM)

Kononova

Klemenkova

2013

Journal of Molecular Structure

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“…[9,16,17] The presence of six-membered boronate rings in 1 and 2 is, however, consistent with a similar solid state structure obtained by Shinkai and co-workers [11] of a 1:2 threitol-aryl boronic acid diester (6) which also showed exclusive formation of six-membered boronate rings. [1,2] The IR spectra (KBr) for 1 and 2 show characteristic B -O absorption bands [18] at 1338 cm À 1 and 1334 cm À 1 , respectively, which are at lower frequencies to the B -O stretch for the tris(phenylboronate) ester of D-mannitol (5) d at 1355 cm À 1 . with the view that, due to ring strain, six-membered trigonal boronate esters are more stable, and hence more readily formed than five-membered esters.…”

Section: Solid State Structures Of Bis(phenyl Boronates) 1 Andmentioning

confidence: 99%

The Selective Silylation of d‐Mannitol Assisted by Phenylboronic Acid and the Solid State and Solution Structures of the Intermediate 1,6‐bis(silyl) bis(phenylboronates)

Bhaskar

D'Elia

Duggan

et al. 2003

Journal of Carbohydrate Chemistry

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The influence of phenylboronic acid on the silylation of D-mannitol by TBDMSCl and TBDPSCl has been investigated. Terminal silyation was found to dominate, with PBA significantly enhancing the yield of 1,6 di-TBDMS D-mannitol compared to the control. The intermediate 1,6-disilyl bis(phenylboronates) showed unusually high stability, such that oxidative conditions were required to cleave the boronate esters. X-ray crystal structures of both bis(phenylboronates) were determined, revealing both diboronate esters to exist as two fused six-membered rings. The results of 11 B NMR experiments suggest that these structures also predominate in solution, whereas the # Current address: bis(phenylboronate) ester of D-mannitol itself exists as a mixture of five-membered and six-membered cyclic boronates.

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481. Infrared spectra of boron compounds

Cited by 82 publications

References 0 publications

Boronated (co)polystyrene: monomer reactivity ratios, thermal behavior and flammability

Boronated (co)polystyrene: monomer reactivity ratios, thermal behavior and flammability

The electronic structure of nido-B10H14 and [6-Ph-nido-6-CB9H11]− in terms of Bader’s theory (AIM)

The Selective Silylation of d‐Mannitol Assisted by Phenylboronic Acid and the Solid State and Solution Structures of the Intermediate 1,6‐bis(silyl) bis(phenylboronates)

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