Additions and Corrections - The Determination of Double-Bond Character in Cyclic Systems. VI. Evidence for Benzenoid Terminal Rings.

1972 ◽  
Vol 94 (17) ◽  
pp. 6247-6248
Author(s):  
John Ferrari ◽  
I. Moyer Hunsberger ◽  
H. Gutowsky
Keyword(s):  
Double Bond ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Bond Character

THE DETERMINATION OF DOUBLE-BOND CHARACTER IN CYCLIC SYSTEMS IV — TETRAHYDRONAPHTHALENE STERIC FACILITATION OF CHELATION

1959 ◽  
pp. 461-474
Author(s):  
I. MOYER HUNSBERGER ◽  
H.S. GUTOWSKY ◽  
WARREN POWELL ◽  
LUCILLE MORIN ◽  
VICTOR BANDURCO
Keyword(s):  
Double Bond ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Bond Character

The Determination of Double-bond Character in Cyclic Systems. IV. Tetrahydronaphthalene. Steric Facilitation of Chelation1

1958 ◽  
Vol 80 (13) ◽  
pp. 3294-3300 ◽  
Author(s):  
I. Moyer Hunsberger ◽  
H. S. Gutowsky ◽  
Warren Powell ◽  
Lucille Morin ◽  
Victor Bandurco
Keyword(s):  
Double Bond ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Bond Character

The Determination of Double-bond Character in Cyclic Systems. III. Indan and o-Xylene

1955 ◽  
Vol 77 (9) ◽  
pp. 2466-2475 ◽  
Author(s):  
I. Moyer Hunsberger ◽  
Daniel Lednicer ◽  
H. S. Gutowsky ◽  
Don L. Bunker ◽  
Peter Taussig
Keyword(s):  
Double Bond ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Bond Character

The Determination of Double-bond Character in Cyclic Systems. II. The 9,10-Bond of Phenanthrene

1952 ◽  
Vol 74 (19) ◽  
pp. 4839-4845 ◽  
Author(s):  
I. Moyer Hunsberger ◽  
Roger Ketcham ◽  
H. S. Gutowsky
Keyword(s):  
Double Bond ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Bond Character

scholarly journals Crystal structure ofN′′-benzyl-N′′-[3-(benzyldimethylazaniumyl)propyl]-N,N,N′,N′-tetramethylguanidinium bis(tetraphenylborate)

2015 ◽  
Vol 71 (12) ◽  
pp. o1086-o1087
Author(s):  
Ioannis Tiritiris ◽  
Willi Kantlehner
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Positive Charge ◽  
Planar Geometry ◽  
Methyl Groups ◽  
Two Dimensional ◽  
Single Bond ◽  
Double Bond Character ◽  
Bond Lengths ◽  
Bond Character

In the crystal structure of the title salt, C24H38N42+·2C24H20B−, the C—N bond lengths in the central CN3unit of the guanidinium ion are 1.3364 (13), 1.3407 (13) and 1.3539 (13) Å, indicating partial double-bond character. The central C atom is bonded to the three N atoms in a nearly ideal trigonal–planar geometry and the positive charge is delocalized in the CN3plane. The bonds between the N atoms and the terminal methyl groups of the guanidinium moiety and the four C—N bonds to the central N atom of the (benzyldimethylazaniumyl)propyl group have single-bond character. In the crystal, C—H...π interactions between the guanidinium H atoms and the phenyl C atoms of the tetraphenylborate ions are present, leading to the formation of a two-dimensional supramolecular pattern parallel to theacplane.

scholarly journals 3-Phenyl-N,N,N′,N′-tetramethyl-1-ethyne-1-carboximidamidium bromide

2012 ◽  
Vol 68 (6) ◽  
pp. o1812-o1812 ◽  
Author(s):  
Ioannis Tiritiris ◽  
Willi Kantlehner
Keyword(s):  
Double Bond ◽  
Title Compound ◽  
Triple Bond ◽  
Positive Charge ◽  
Bond Distance ◽  
Double Bond Character ◽  
Acetylenic Bond ◽  
Compound C ◽  
Bond Character

The reaction of 3,3,3-tris(dimethylamino)-1-phenylprop-1-yne with bromine in pentane yields the title compound, C13H17N2 +·Br−. The acetylenic bond distance [1.197 (2) Å] is consistent with a C[triple-bond]C triple bond. The amidinium C=N bonds [1.325 (2) and 1.330 (2) Å] have double-bond character and the positive charge is delocalized between the two dimethylamino groups.

THE SOLVOLYSIS OF THE ALPHA- AND BETA-3,4,6-TRI-O-ACETYL-D-GLUCOPYRANOSYL CHLORIDES

1955 ◽  
Vol 33 (1) ◽  
pp. 128-133 ◽  
Author(s):  
R. U. Lemieux ◽  
G. Huber
Keyword(s):  
Acetic Acid ◽  
Double Bond ◽  
Positive Charge ◽  
Main Reaction ◽  
Main Reaction Product ◽  
Double Bond Character ◽  
Ionic Reactions ◽  
Oxygen Bond ◽  
Bond Character ◽  
Anomeric Center

3,4,6-Tri-O-acetyl-β-D-glucopyranosyl chloride was found to undergo solvolysis in acetic acid to form 1,3,4,6-tetra-O-acetyl-α-D-glucopyranose as the main reaction product. The much less reactive anomeric α-chloride also appeared to undergo solvolysis with extensive inversion of the anomeric center. It is submitted that the tendencies for inversion obtained in these ionic reactions are due to the conformations imposed on the intermediate ions through distribution of the positive charge to the ring oxygen and the consequent introduction of double-bond character to the carbon-1 to ring-oxygen bond.

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