The Determination of Double-bond Character in Cyclic Systems. V. Proton Chemical Shifts in Chelated Derivatives of Benzene, Naphthalene and Phenanthrene1,2

1960 ◽  
Vol 82 (19) ◽  
pp. 5057-5063 ◽  
Author(s):  
A. L. Porte ◽  
H. S. Gutowsky ◽  
I. Moyer Hunsberger
Keyword(s):  
Double Bond ◽  
Chemical Shifts ◽  
Double Bond Character ◽  
Cyclic Systems ◽  
Derivatives Of ◽  
Proton Chemical Shifts ◽  
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

Gradient-Enhanced Inverse-Detected NMR Techniquesfor Determination of 1H-15N Coupling Constants in 2,2-Dimethylpenta-3,4-dienal Derivatives

1997 ◽  
Vol 62 (11) ◽  
pp. 1747-1753 ◽  
Author(s):  
Radek Marek
Keyword(s):  
Double Bond ◽  
Chemical Shifts ◽  
Multiple Bond ◽  
Coupling Constants ◽  
Single Quantum ◽  
Nmr Techniques ◽  
Phase Sensitive ◽  
Heteronuclear Coupling

Determination of 15N chemical shifts and heteronuclear coupling constants of substituted 2,2-dimethylpenta-3,4-dienal hydrazones is presented. The chemical shifts were determined by gradient-enhanced inverse-detected NMR techniques and 1H-15N coupling constants were extracted from phase-sensitive gradient-enhanced single-quantum multiple bond correlation experiments. Stereospecific behaviour of the coupling constants 2J(1H,15N) and 1J(1H,13C) has been used to determine the configuration on a C=N double bond. The above-mentioned compounds exist predominantly as E isomers in deuteriochloroform.

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.

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