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This reactivity is perhaps a little surprising at first: we might expect a double bond
to be stronger than a single one, and therefore more stable. Table 27.2 Bond
energies and bond lengths of C— C, (in ethane) bond energy/kJ mof1 346 bond
...
Graham Hill, John Holman, 2000
2
Solid State Chemistry and Its Applications
Further, the dissociation energy of oxygen gas molecules, requiring cleavage of
the double bond is 498 kJ mol~1. Recognition of the lone pair bond weakening
effect in N,O and F leads to explanations of many phenomena: (a) Oxygen is a ...
When a nitrogen atom is sp2-hybridized, it can form a double bond (one a bond
and one TT bond) by overlapping orbitals with those of another 5p2-hybridized
atom. • Double Bonding at Nitrogen The mixing of atomic orbitals to form hybrid ...
Marye Anne Fox, James K. Whitesell, 2004
4
Linus Pauling: Selected Scientific Papers
509] The Dependence of Interatomic Distance on Single Bond-Double Bond
Resonance1 BY LINUS PAULING, L. O. ... in benzene each carbon-carbon bond
resonates about equally between a single bond and a double bond (as given by
the ...
Linus Pauling, Barclay Kamb, 2001
Amides have partial double bond character between C and N; the rotational
barrier around this bond is about 89 kj is found with L-amino acids. Furthermore,
the a-helix is closely associated with the structure of proteins. It is worth
mentioning ...
David G. Morris, Royal Society of Chemistry (Great Britain), 2001
6
Handbook of Analytical Derivatization Reactions
4. Unsaturated,. Cyclopropane,. and. Methyl. Branched. Fatty. Acids: Derivatives.
for. Determination. of. Substituent. Location. 4.1. Derivatives Tor Determination of
Unsaturation Location. 226 4. .1. Double Bond Cleavage Derivatives. 226 4. .2 ...
In a series of enzyme-catalyzed reactions (Figure 26.14), retinol undergoes a two
-electron oxidation to all-trans-retinal, isomerization about the carbon 11 to 12
double bond to give 11-cis-retinal, and formation of an imine (Section 16.8) with ...
William Brown, Christopher Foote, Brent Iverson, 2011
8
The Nature of the Chemical
Bond and the Structure of ...
The observed value for benzene," 1.397 ± 0.001 A, is only 0.07 A greater than the
double- bond distance. It is to be expected that the bending of the bent bonds of
the two \ / double bonds in a system C — C away from their tetrahedral direc- ...
9
The LaTex Graphics Companion: Illustrating Documents with ...
The substituent is separated from this by two equals signs; e.g., 10==0 ; 3==0CH
$_3$ ; . . . means that the bond at the atom in position one takes an oxygen atom
(O) through a double bond, the bond in position three takes a methoxy group ...
Michel Goossens, Sebastian Rahtz, Frank Mittelbach, 1997
10
Invitation to Organic Chemistry
The double bond in ethene has no substituents, propene is monosubstituted, and
cyclohexene is disubstituted. Cyclopentadiene has two disubstituted double
bonds. Vitamin A alcohol has two disubstituted double bonds, two trisubstituted ...
Alyn William Johnson, 1999
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Pinot party: Top tasting comes to Reno after 12 years in SF
The Shootout "is one of the most rigorous contests in the U.S. for pinots noirs," said John Klacking of Reno, whose Double Bond winery has ... «Reno Gazette Journal, 七月 15»
Are Your Cooking Oils Healthy?
Olive oil is primarily a monounsaturated fat, which means it has one double bond in its fatty acid structure. Although a monounsaturated fat is ... «Daily Times Nigeria, 七月 15»
Copper catalysis overcomes double bond trouble
In the MIT chemists' catalytic cycle, copper hydride first inserts into the alkene's double bond, with the copper atom and its ligands remaining ... «Royal Society of Chemistry, 七月 15»
Having trouble choosing the right cooking oil? So is everyone else.
“If you pluck out two hydrogens, you get a single, double bond. That's a monounsaturate. More than one double bond is a polyunsaturate.”. «WBFO, 七月 15»
Substrates change nanoparticle reactivity
This strain changes how CO interacts with Pd. CO typically binds to Pd at a 90-degree angle and has a double bond character. However, in ... «Phys.Org, 六月 15»
Health Column: The language of fats
The C atoms are bound together by a single or double bond depending on whether two H or one H atoms are attached. When a C atom has ... «Grand Junction Free Press, 六月 15»
Understanding how fatty acids bonds affect obesity, diabetes
SCD-1 introduces the first double bond into saturated fatty acids, a key reaction in fatty acid metabolism. Since inhibition of SCD-1 reduces fat ... «Baylor College of Medicine News, 六月 15»
Cut trans fat to maintain good health
Trans fat is a geometric configuration of the fat molecule; two carbon chain branches are on the opposite sides (trans) of a double bond in the ... «Northern Californian, 六月 15»
FDA: no more 'unsafe' trans fats
... this results in the hydrogen atoms attached to the carbon atoms at a double bond being on opposite sides of the double bond ("trans" means ... «Medical News Today, 六月 15»
What's tasty isn't healthy: What are trans fats?
... a geometric configuration of the fat molecule in which two carbon chain branches are on the opposite sides (trans) of a double bond. «Times of India, 六月 15»
