The canonical behavior of the entropic component of thermodynamic effective molarity. An attempt at unifying covalent and noncovalent cyclizations

2019 ◽  
Vol 21 (3) ◽  
pp. 955-987 ◽  
Author(s):  
Stefano Di Stefano ◽  
Luigi Mandolini
Keyword(s):  
Effective Molarity ◽  
Single Bonds

The statistically corrected entropic component of effective molarity (EMS*) complies with the “canonical” values expressed by the log plot of EMS* vs. the number n of single bonds in the ring product.

HMSC: Simultaneously Detected Heteronuclear Shift Correlation through Multiple and Single Bonds

2001 ◽  
Vol 148 (1) ◽  
pp. 88-94 ◽  
Author(s):  
Rémy Burger ◽  
Christian Schorn ◽  
Peter Bigler
Keyword(s):  
Single Bonds

The siliconyl, boronyl, and iminoboryl ligands as analogues of the well-known carbonyl ligand: predicted reactivity towards dipolar cyclooligomerization in iron/cobalt carbonyl complexes

RSC Advances ◽  
2015 ◽  
Vol 5 (45) ◽  
pp. 35558-35563 ◽  
Author(s):  
Zhong Zhang ◽  
Liang Pu ◽  
Qianshu Li ◽  
R. Bruce King
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Carbonyl Complexes ◽  
Carbonyl Ligand ◽  
Cobalt Carbonyl ◽  
Functional Theory ◽  
Iron Cobalt ◽  
Single Bonds

The Fe(CO)4(SiO), Co(CO)4(BO), and Co(CO)4(BNSiMe3), complexes akin to the well-known Fe(CO)5 are predicted by density functional theory to undergo exothermic oligomerization to give the oligomers containing SinOn/BnOn/B2N2 rings with single bonds.

ChemInform Abstract: Selective Activation of Alkyl- and Aryl-Oxygen Single Bonds in Solution with Transition-Metal Complexes.

ChemInform ◽  
2010 ◽  
Vol 28 (25) ◽  
pp. no-no
Author(s):  
M. E. VAN DER BOOM ◽  
S.-Y. LIOU ◽  
Y. BEN-DAVID ◽  
A. VIGALOK ◽  
D. MILSTEIN
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Selective Activation ◽  
Single Bonds

scholarly journals Activation of R235A Mutant Orotidine 5′-Monophosphate Decarboxylase by the Guanidinium Cation: Effective Molarity of the Cationic Side Chain of Arg-235

Biochemistry ◽  
2010 ◽  
Vol 49 (5) ◽  
pp. 824-826 ◽  
Author(s):  
Shonoi A. Barnett ◽  
Tina L. Amyes ◽  
B. McKay Wood ◽  
John A. Gerlt ◽  
John P. Richard
Keyword(s):  
Side Chain ◽  
Monophosphate Decarboxylase ◽  
Effective Molarity ◽  
Guanidinium Cation

Transition metal-catalyzed arylation of unstrained C−C single bonds

2021 ◽  
Author(s):  
Long Yang ◽  
Wuxin Zhou ◽  
Qiang Li ◽  
Xiangge Zhou
Keyword(s):  
Organic Chemistry ◽  
Transition Metal ◽  
Bond Activation ◽  
Important Research ◽  
Carbon Bond ◽  
Research Areas ◽  
Carbon Carbon Bond ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed ◽  
Single Bonds

Carbon−carbon bond activation is one of the most challenging and important research areas in organic chemistry. Selective C−C bond activation of unstrained substrates is difficult to achieve owing to its...

A Novel Class of Rigid-rod Perylene Diimides and Isoindigo Semiconducting Polymers

2021 ◽  
Author(s):  
Yaping Yu ◽  
Danlei Zhu ◽  
Xiuyuan Zhu ◽  
Mahesh kumar Ravva ◽  
Jiayao Duan ◽  
...  
Keyword(s):  
Double Bond ◽  
Conjugated Polymers ◽  
Optoelectronic Properties ◽  
Semiconducting Polymers ◽  
Perylene Diimides ◽  
Rigid Rod ◽  
Single Bonds

Rigid-rod conjugated polymers contain only double-bond linkers instead of single-bonds between the monomer linkages along the backbone. These polymers exhibit exceptional optoelectronic properties and promising devices performances owing to the...

Photo-Driven Dehydrogenative Homo-Coupling of Benzylic C–H Bonds Forming Strained C–C Bonds

Synlett ◽  
2021 ◽  
Author(s):  
Naoki Ishida ◽  
Mingon Son ◽  
Tairin Kawasaki ◽  
Misato Ito ◽  
Masahiro Murakami
Keyword(s):  
Coupling Reaction ◽  
Gaseous Hydrogen ◽  
Environmentally Benign ◽  
Single Bonds

A photoinduced dehydrogenative homo-coupling reaction of alkylarenes is reported. Gaseous hydrogen is evolved as the sole byproduct and neither oxidants nor hydrogen acceptors are required. The present reaction offers an environmentally benign and atom-economical means for forming sterically strained C–C single bonds. It also gives a remarkable example of photo-driven reactions overcoming a considerable rise in energy.

The Change in the Raman Spectra of Chloroprene and Isoprene in the Polymerization Process

1943 ◽  
Vol 16 (4) ◽  
pp. 841-847
Author(s):  
A. Gantmacher ◽  
S. Medvedev
Keyword(s):  
Raman Spectrum ◽  
Double Bond ◽  
Raman Spectra ◽  
Polymer Molecule ◽  
Polymerization Process ◽  
High Polymer ◽  
Single Bond ◽  
Double Bonds ◽  
Continuous Background ◽  
Single Bonds

Abstract 1. When chloroprene and isoprene polymerize, besides the frequency characterizing the conjugate double bond in the monomer, there appears a higher frequency corresponding to the isolated double bond in the polymer. In the polymerization process, the intensity of the frequency of the conjugate double bond decreases and the intensity of the frequency of the isolated double bond increases. Because of the increase in the number of single bonds in the polymer, the intensity of the frequency of the single bond 1005 in the polymer is considerably greater than in the monomer. 2. Even in the case of the samples with high polymer contents (greater than 50 per cent), the intensity of the frequency of the conjugate double bond is considerably greater than the intensity of the frequency of the isolated double bond. This is attributable to the fact that part of double bonds disappear during polymerization. 3. The Raman spectra of the chloroprene and isoprene polymers differ essentially from those of the monomers. To characterize the frequencies of vibration in the polymer molecule, it is essential to investigate its Raman spectrum in a medium free of the monomer. 4. The formation of highly polymeric molecules on polymerization does not result in an increase in the intensity of the continuous background in spectrograms.

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