Charge distributions and chemical effects. XXXII. Energies of multiple carbon–carbon bonds

1983 ◽  
Vol 61 (12) ◽  
pp. 2679-2683 ◽  
Author(s):  
S. Fliszár
Keyword(s):  
Nuclear Potential ◽  
Bond Energies ◽  
Unsaturated Hydrocarbons ◽  
Carbon Bond ◽  
Charge Distributions ◽  
Chemical Effects ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
The Individual

Bond energies are derived from total (nuclear–electronic and nuclear–nuclear) potential energies involving the individual nuclei of a molecule. It appears that the carbon–carbon bond energies in ethane, ethylene, allene, acetylene, and benzene are in a ratio of 1:2:1.9:2.9:1.6. This result enables a rapid estimate of approximate atomization energies of unsaturated hydrocarbons from those of their corresponding saturated parent compounds and, more importantly, shows the links relating to one another the various classes of saturated and unsaturated hydrocarbons in a unifying fashion.

scholarly journals Metal-free visible light photoredox enables generation of carbyne equivalents via phosphonium ylide C–H activation

2019 ◽  
Vol 10 (6) ◽  
pp. 1687-1691 ◽  
Author(s):  
Mrinmoy Das ◽  
Minh Duy Vu ◽  
Qi Zhang ◽  
Xue-Wei Liu
Keyword(s):  
Visible Light ◽  
Bond Formation ◽  
Formation Processes ◽  
New Approach ◽  
Carbon Bond ◽  
Metal Free ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
New Strategy

Phosphonium ylides have shown their synthetic usefulness in important carbon–carbon bond formation processes. Our new strategy employs phosphonium ylides as novel carbyne equivalents and features a new approach for constructing carbon–carbon bonds from alkenes.

Cleavage of carbon–carbon bonds by radical reactions

2019 ◽  
Vol 48 (9) ◽  
pp. 2615-2656 ◽  
Author(s):  
Paramasivam Sivaguru ◽  
Zikun Wang ◽  
Giuseppe Zanoni ◽  
Xihe Bi
Keyword(s):  
Bond Cleavage ◽  
Radical Reactions ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
Cleavage Reactions

This review provides insights into the in situ generated radicals triggered carbon–carbon bond cleavage reactions.

Introduction of a (Ph3P)2Pt group into the rim of an open-cage fullerene by breaking a carbon–carbon bond

2021 ◽  
Vol 57 (79) ◽  
pp. 10218-10221
Author(s):  
Steven R. Gralinski ◽  
Mrittika Roy ◽  
Lilia M. Baldauf ◽  
Marilyn M. Olmstead ◽  
Alan L. Balch
Keyword(s):  
Platinum Atom ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
The Many

A remarkable open-cage fullerene with a four coordinate platinum atom incorporated into its rim has been prepared by cleavage of just one of the many carbon–carbon bonds of the fullerene.

scholarly journals Direct activation of relatively unstrained carbon–carbon bonds in homogeneous systems

2014 ◽  
Vol 1 (5) ◽  
pp. 567-581 ◽  
Author(s):  
Alpay Dermenci ◽  
Jotham W. Coe ◽  
Guangbin Dong
Keyword(s):  
Bond Activation ◽  
State Of The Art ◽  
Carbon Bond ◽  
Homogeneous Systems ◽  
Direct Activation ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
Art Methods

This review highlights the frontier of carbon–carbon bond activation and discusses state-of-the-art methods for activating relatively unstrained bonds in homogeneous systems.

Organocatalytic Difluorobenzylation of 1,2-Diketones via Mild Cleavage of Carbon−Carbon Bonds

2022 ◽  
Author(s):  
Yong Zhang ◽  
Guo-Wei Lai ◽  
Long-Jun Nie ◽  
Qifang He ◽  
Mei-Juan Lin ◽  
...  
Keyword(s):  
Bond Cleavage ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
New Type

α-aryl-α,α-Difluoroacetophenones (DFAPs) are developed as a new type of difluorobenzylation reagents that can be facilely prepared from readily available and cheap starting materials. In-situ carbon-carbon bond cleavage of electron-deficient DFAPs...

Nomenclature of Lignans and Neolignans (IUPAC Recommendations 2000)

2000 ◽  
Vol 72 (8) ◽  
pp. 1493-1523 ◽  
Author(s):  
G. P. Moss
Keyword(s):  
Natural Products ◽  
Oxygen Atom ◽  
Benzene Ring ◽  
Carbon Bond ◽  
Large Group ◽  
Ether Oxygen Atom ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
Ether Oxygen

Lignans and neolignans are a large group of natural products characterized by the coupling of two C6C3 units. For nomenclature purposes the C6C3 unit is treated as propylbenzene and numbered from 1 to 6 in the ring, starting from the propyl group, and with the propyl group numbered from 7 to 9, starting from the benzene ring. With the second C6C3 unit the numbers are primed. When the two C6C3 units are linked by a bond between positions 8 and 8' the compound is referred to and named as a lignan. In the absence of the C-8 to C-8' bond, and where the two C6C3 units are linked by a carbon–carbon bond it is referred to and named as a neolignan. The linkage with neolignans may include C-8 or C-8'. Where there are no direct carbon–carbon bonds between the C6C3 units and they are linked by an ether oxygen atom the compound is named as an oxyneolignan. The nomenclature provides for the naming of additional rings and other modifications following standard organic nomenclature procedures for naming natural products. Provision is included to name the higher homologues. The sesquineolignans have three C6C3 units, and dineolignans have four C6C3 units.

Recent developments in the formation of carbon-carbon bond reactions catalyzed by metalloporphyrins

2003 ◽  
Vol 07 (05) ◽  
pp. 351-356 ◽  
Author(s):  
Pietro Tagliatesta ◽  
Barbara Floris ◽  
Pierluca Galloni
Keyword(s):  
Carbon Bond ◽  
Recent Advances ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
Recent Developments ◽  
Olefination Reactions

Recent advances in the catalytic formation of carbon-carbon bonds by metalloporphyrins are surveyed. New studies on cyclopropanation and olefination reactions are discussed and a new application of metalloporphyrin catalysis, the cyclotrimerization of phenylethynes, is presented.

Iridium-catalysed hydrosilylation of cyclopropanes via regioselective carbon–carbon bond cleavage

2017 ◽  
Vol 53 (66) ◽  
pp. 9281-9284 ◽  
Author(s):  
Masahito Murai ◽  
Atsushi Nishiyama ◽  
Naoki Nishinaka ◽  
Haruka Morita ◽  
Kazuhiko Takai
Keyword(s):  
Bond Cleavage ◽  
Carbon Bond ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds

Catalytic and regioselective hydrosilylation of electronically unactivated cyclopropanes via the selective cleavage of proximal carbon–carbon bonds was developed.

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