scholarly journals Vibrational Spectroscopy of N-Methyliminodiacetic Acid (MIDA)-Protected Boronate Ester: Examination of the B–N Dative Bond

2011 ◽  
Vol 115 (24) ◽  
pp. 6426-6431 ◽  
Author(s):  
Dana N. Reinemann ◽  
Ashley M. Wright ◽  
Jonathan D. Wolfe ◽  
Gregory S. Tschumper ◽  
Nathan I. Hammer
Keyword(s):  
Vibrational Spectroscopy ◽  
Boronate Ester ◽  
Dative Bond ◽  
Methyliminodiacetic Acid

scholarly journals Cyclopentadithiophene polymers synthesised via Suzuki-Miyaura polymerisation of MIDA boronate esters

2020 ◽  
Vol 1 ◽  
Author(s):  
Josue Ayuso-Carrillo
Keyword(s):  
Conjugated Polymers ◽  
Organic Electronics ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Reaction Conditions ◽  
Boronate Esters ◽  
Boronate Ester ◽  
Cross Coupling Reaction ◽  
Synthetic Routes ◽  
Methyliminodiacetic Acid

AbstractCyclopentadithiophene (CPDT), a Csp3-bridged bithiophene heteroaromatic unit, displays interesting properties when it is embedded in the repeating units of π-conjugated polymers, and they are applied in organic electronics devices. Common synthetic routes to CPDT-derived polymers rely on toxic methodologies whilst alternative non-toxic strategies such as the Suzuki-Miyaura reaction have been less studied. In this report we demonstrate that the use of a N-methyliminodiacetic acid (MIDA) boronate ester-derived CPDT monomer allows the efficient formation of poly(cyclopentadithiophene) homopolymer under Suzuki-Miyaura cross-coupling reaction conditions. Thus, the use of MIDA boronate esters might be extended to other organic units to design and construct a plethora of π-conjugated polymers.

scholarly journals meta-Selective C–H functionalisation of aryl boronic acids directed by a MIDA-derived boronate ester

2020 ◽  
Vol 11 (12) ◽  
pp. 3301-3306 ◽  
Author(s):  
Alexander F. Williams ◽  
Andrew J. P. White ◽  
Alan C. Spivey ◽  
Christopher J. Cordier
Keyword(s):  
Acid Derivative ◽  
Boronic Acids ◽  
Protecting Group ◽  
Boronate Ester ◽  
Methyliminodiacetic Acid

An N-methyliminodiacetic acid derivative allows the meta-C–H functionalisation of boronic acids, acting simultaneously as a directing and protecting group.

VIBRATIONAL SPECTROSCOPY, RESONANCE FRACTION AND MOLECULAR MOTION

1974 ◽  
Vol 35 (C6) ◽  
pp. C6-131-C6-137 ◽  
Author(s):  
Y. HAZONY ◽  
R. H. HERBER
Keyword(s):  
Vibrational Spectroscopy ◽  
Molecular Motion

X-ray Structure Refinement and Vibrational Spectroscopy of Ca8Gd2 (PO4)6 O2

2013 ◽  
Vol 12 (10) ◽  
pp. 719-726
Author(s):  
R. Ayadi ◽  
Mohamed Boujelbene ◽  
T. Mhiri
Keyword(s):  
Solid State ◽  
General Formula ◽  
Vibrational Spectroscopy ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Solid State Reaction ◽  
Structure Refinement ◽  
Unit Cell ◽  
Cell Group ◽  
X Ray

The present paper is interested in the study of compounds from the apatite family with the general formula Ca10 (PO4)6A2. It particularly brings to light the exploitation of the distinctive stereochemistries of two Ca positions in apatite. In fact, Gd-Bearing oxyapatiteCa8 Gd2 (PO4)6O2 has been synthesized by solid state reaction and characterized by X-ray powder diffraction. The site occupancies of substituents is0.3333 in Gd and 0.3333 for Ca in the Ca(1) position and 0. 5 for Gd in the Ca (2) position.  Besides, the observed frequencies in the Raman and infrared spectra were explained and discussed on the basis of unit-cell group analyses.

Vibrational spectroscopy and chemometric procedures for the rapid assessment of olive oil authenticity

2018 ◽  
Vol 29 (5) ◽  
pp. 22-23
Author(s):  
Magdi Mossoba ◽  
◽  
Sanjeewa Karunathilaka ◽  
Kyungeun Lee ◽  
Lea Brückner ◽  
...  
Keyword(s):  
Olive Oil ◽  
Vibrational Spectroscopy ◽  
Rapid Assessment

Polarity of a dative bond Donor and acceptor electronegativities

2018 ◽  
Vol 15 (4e) ◽  
pp. 335
Author(s):  
Julio J. Andrade Gamboa
Keyword(s):  
Dative Bond ◽  
Donor And Acceptor

<span>La polaridad de un enlace dativo entre átomos idénticos no puede ser explicada con base en las electronegatividades usuales. Si suponemos que ambos átomos tienen la misma electronegatividad, las cargas atómicas serán (tomando como unidad el valor absoluto de la carga del electrón) las cargas formales; esto es: —1 para el átomo aceptor y +1 para el átomo dador. Esto implica una polaridad anormalmente alta para un enlace covalente.</span>

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