Pitzer strain
In chemistry, a molecule experiences strain when its chemical structure undergoes some stress which raises its internal energy in comparison to a strain-free reference compound. The internal energy of a molecule consists of all the energy stored within it. A strained molecule has an additional amount of internal energy which an unstrained molecule does not. This extra internal energy, or strain energy, can be likened to a compressed spring. Much like a compressed spring must be held in place to prevent release of its potential energy, a molecule can be held in an energetically unfavorable conformation by the bonds within that molecule. Without the bonds holding the conformation in place, the strain energy would be released.

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Strain (chemistry) - Wikipedia, the free encyclopedia
In chemistry, a molecule experiences strain when its chemical structure undergoes some stress which raises .... In cyclic molecules, it is also called Pitzer strain.
en.wikipedia.org/wiki/Strain_(chemistry)
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Ring strain - Wikipedia, the free encyclopedia
Ring strain results from a combination of angle strain, conformational strain or Pitzer strain, and transannular strain or van der Waals strain. The simplest ...
en.wikipedia.org/wiki/Ring_strain
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Prelog strain - Wikipedia, the free encyclopedia
In organic chemistry, transannular strain (also called Prelog strain after Nobel ... Some of this strain is certainly due to Pitzer strain and large-angle strain, but a ...
en.wikipedia.org/wiki/Prelog_strain
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IUPAC Gold Book - eclipsing strain
Synonyms: bond opposition strain, Pitzer strain, torsional strain. Intramolecular strain present due to nonbonded interactions between two eclipsed atoms or ...
goldbook.iupac.org/E01886.html
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Definitions of pitzer strain - OneLook Dictionary Search
We found one dictionary that includes the word Pitzer strain: General dictionaries General (1 matching dictionary). Pitzer strain: Wikipedia, the Free Encyclopedia ...
www.onelook.com/?lang=all&w=pitzer+strain
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What Is Torsional Strain? - Ask.com
In organic chemistry, the torsional strain describes the resistance of bonds to twisting. It is also called Pitzer strain when used to describe molecules that.
www.ask.com/question/what-is-torsional-strain
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(2, 27 kcal/mol), the energetic consequences of Pitzer strain, Baeyer strain, hybridization ... Results reveal that Pitzer strain in both 1 and 2 is just 4 kcal/mol and.
smu.edu/catco/pdf/JACS_108_7467_1986.pdf
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A Theoretical Investigation of the Ring Strain Energy, Destabilization ...
Aug 13, 2012 ... g and DSE values of CL-20 conformers must be due, primarily, to torsional strain (Pitzer strain), transannular strain (Prelog strain), and van der ...
downloads.hindawi.com/journals/apc/2012/175146.pdf
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Pitzer strain? escaped fragment =!ARV6FUJ2JP synonym by ...
Pitzer strain synonym by Babylon's thesaurus. Thesaurus > Synonym of Pitzer strain. Synonym of Pitzer strain. ويكيبيديا العربية – الموسوعة المجانية. مقارب.
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Pitzer Strain - Search
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Pitzer strain in science
Kenneth Pitzer - Wikipedia, the free encyclopedia
6th President of Stanford University ... He was the third president of Rice University from 1961 until 1968 and sixth president of Stanford University ... Pitzer strain ...
Strain (chemistry) - Wikipedia, the free encyclopedia
In cyclic molecules, it is also called Pitzer strain. ... Modern Physical Organic Chemistry, University Science Books, 2006, ISBN 978-1-891389-31-3; ^ Coxon and ...
Ring strain - Wikipedia, the free encyclopedia
In organic chemistry, ring strain is a type of instability that exists when bonds in ... Ring strain results from a combination of angle strain, conformational strain or Pitzer strain, and transannular strain or .... Sausalito, CA: University Science, 2006.
IUPAC Gold Book - eclipsing strain
Synonyms: bond opposition strain, Pitzer strain, torsional strain. Intramolecular strain present due to nonbonded interactions between two eclipsed atoms or ...
Pitzer strain - medical-answers.org
Close. Your First Name: Friends First Name: Friends Email ...
[PDF]A Theoretical Investigation of the Ring Strain Energy, Destabilization ...
Aug 13, 2012 ... Department of Chemistry and Biochemistry, University of Northern Iowa, Cedar Falls, .... Other factors such as torsional strain (Pitzer strain) and.
Thomas Borowski, PhD - Pitzer College
With Pitzer Since: 2004 ... M.Sc., PhD, University of Saskatchewan ... “Central monoamine Activity in Genetically Distinct Strains of Mice Following a Psychogenic ...
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Results reveal that Pitzer strain in both 1 and 2 is just 4 kcal/mol and that CH bond ..... E. M.; Pople, J. A,, Carnegie-Mellon University, Pittsburgh, 1982.
Books on the term Pitzer strain
Stereochemistry Conformation and Mechanism
Stereochemistry Conformation and Mechanism
P.S. Kalsi, 2005
In conclusion the results support the assumption that the observed reactivity is the result of one predominant conformation of the substrate. 4.5 ANGLE AND Pitzer strain Angle strain is also referred to as Baeyer strain. The normal angle ...
Modern Physical Organic Chemistry
Modern Physical Organic Chemistry
Eric V. Anslyn and Dennis A. Dougherty, 2005
This is the first modern textbook, written in the 21st century, to make explicit the many connections between physical organic chemistry and critical fields such as organometallic chemistry, materials chemistry, bioorganic chemistry, and biochemistry. In the latter part of the 20th century, the field of physical organic chemistry went through drama...
Organic Chemistry: An Acid—Base Approach
Organic Chemistry: An Acid—Base Approach
Michael B. Smith, 2011
8.5.2. Torsion. (Pitzer). Strain. A cyclic molecule such as cyclopentane does not exist in a planar conformation (i.e., as a flat ring, 47). A molecular model of this flat ring is shown in 47A, and it is clear that all of the C–H bonds eclipse. Just as in ...
Organic Chemistry: An Acid - Base Approach
Organic Chemistry: An Acid - Base Approach
Michael B. Smith, 2010
Based on the premise that many, if not most, reactions in organic chemistry can be explained by variations of fundamental acid-base concepts, Organic Chemistry: An Acid–Base Approach provides a framework for understanding the subject that goes beyond mere memorization. The individual steps in many important mechanisms rely on acid–base reactions, a...
Organic Synthesis
Organic Synthesis
Michael B Smith, 2011
Cyclopropane (169), planar cyclobutane (170A) and planar cyclopentane (171A) exhibit a second major type of strain, ... This type of strain is called Pitzer or bond opposition strain and is defined as the increase in energy for a compound ...
Chemical Biology
Chemical Biology
Herbert Waldmann and Petra Janning, 2009
This first book to adopt a problem-based approach teaches the true basics of the subject through illustrated everyday case studies. The editor's extensive experience in writing textbooks and his close relationship to the authors ensure that the contributions are presented in a pedagogically uniform and highly motivating fashion. Each chapter i...
Computational Organic Chemistry
Computational Organic Chemistry
Steven M. Bachrach, 2007
The values of b in cyclopropane and cyclobutane are 78.88 and 96.58, respectively, leading to Baeyer strain energies of ... As the rotational barrier in ethane is nearly 3 kcal mol21, a first estimate at the Pitzer strain due to a pair of eclipsing ...
Stereochemistry of Organic Compounds
Stereochemistry of Organic Compounds
Ernest L. Eliel and Samuel H. Wilen, 1994
Stereochemistry of Organic Compounds The first fully referenced, comprehensive book on this subject in more than thirty years, Stereochemistry of Organic Compounds contains up-to-date coverage and insightful exposition of all important new concepts, developments, and tools in the rapidly advancing field of stereochemistry, including:* Asymmetric an...
March's Advanced Organic Chemistry: Reactions, Mechanisms, ...
March's Advanced Organic Chemistry: Reactions, Mechanisms, ...
Michael B. Smith, 2013
Strain in Other Rings'm In rings larger than four-membered, there is no strain due to small bond angles, but there are ... In rings larger than nine-membered, Pitzer strain seems to disappear, but transannular strain is still present.473 For 9- and ...
Perspectives on Structure and Mechanism in Organic Chemistry
Perspectives on Structure and Mechanism in Organic Chemistry
Felix A. Carroll, 2010
Helps to develop new perspectives and a deeper understanding of organic chemistryInstructors and students alike have praised Perspectives on Structure and Mechanism in Organic Chemistry because it motivates readers to think about organic chemistry in new and exciting ways. Based on the author's first hand classroom experience, the text uses co...
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