Locating Protonated Amines in Clathrates

2013 ◽  
Vol 135 (39) ◽  
pp. 14821-14830 ◽  
Author(s):  
Terrence M. Chang ◽  
Richard J. Cooper ◽  
Evan R. Williams
Keyword(s):  
Protonated Amines

Formate-Based Magnetic Metal-Organic Frameworks Templated by Protonated Amines

2010 ◽  
Vol 22 (13) ◽  
pp. 1526-1533 ◽  
Author(s):  
Zheming Wang ◽  
Keli Hu ◽  
Song Gao ◽  
Hayao Kobayashi
Keyword(s):  
Metal Organic Frameworks ◽  
Magnetic Metal ◽  
Protonated Amines ◽  
Metal Organic

ChemInform Abstract: DIHEDRAL ANGULAR DEPENDENCE OF H-N-C-H COUPLING CONSTANTS, PROTONATED AMINES IN TRIFLUOROACETIC ACID

1973 ◽  
Vol 4 (44) ◽  
pp. no-no
Author(s):  
ROBERT R. FRASER ◽  
ROGER N. RENAUD ◽  
JOHN K. SAUNDERS ◽  
YUK Y. WIGFIELD
Keyword(s):  
Angular Dependence ◽  
Trifluoroacetic Acid ◽  
Coupling Constants ◽  
Protonated Amines

Studies on the Nature and Strength of Pt . . .H(-N) Interactions. The Crystal Structures of Chloro[N-(2-aminoethyl)-N-(2-ammonioethyl)ethane-1,2-diamine]platinum(II) Chloride and Dichloro[4,7-diaza-1-azoniacyclononane]platinum(II) Tetrachlor

2000 ◽  
Vol 53 (6) ◽  
pp. 451 ◽  
Author(s):  
Murray S. Davies ◽  
Ronald R. Fenton ◽  
Fazlul Huq ◽  
Edwina C. H. Ling ◽  
Trevor W. Hambley
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Molecular Mechanics ◽  
Metal Ion ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Protonated Amine ◽  
Protonated Amines ◽  
Close Contacts

Two complexes, namely, chloro[N-(2-aminoethyl)-N-(2-ammonioethyl)ethane-1,2-diamine]platinum(II) chloride {[PtCl(tren+H)]Cl2} and dichloro[4,7-diaza-1-azoniacyclononane]platinum(II) tetrachloroplatinate(II)–water (1/2) {[PtCl2(tacn+H)]2[PtCl4]·2H2O}, have been prepared and structurally characterized by single-crystal X-ray diffractometry as part of a study of the nature and strength of Pt···H(–N) interactions. Crystals of [PtCl(tren+H)]Cl2 are monoclinic, space group P21/c, a 8.293(2), b 14.396(6), c 11.305(3) Å, β 107.34(2)º, Z 4, and the structure has been refined to a residual of 0.042 based on 1631 reflections. Crystals of [PtCl2(tacn+H)]2[PtCl4]·2H2O are monoclinic, space group P21/a, a 12.834(4), b 8.206(4), c 13.116(8) Å, β 93.01(4)˚, Z 2, and the structure has been refined to a residual of 0.035 based on 1974 reflections. In [PtCl(tren+H)]2+, the protonated amine forms hydrogen bonds with chloride anions and no close contacts with the metal ion. In [PtCl2(tacn+H)]+, a short intramolecular contact is observed between the metal and the protonated amine and the results of molecular mechanics modelling are consistent with there being a Pt···H hydrogen bond. Molecular mechanics modelling of [PtCl(tren+H)]2+ and [PtCl2(dien+H)]+ shows that the protonated amines could readily form close contacts with the metal. It is concluded that there is evidence for the formation of Pt···H(–N) hydrogen bonds but these bonds are very weak, being similar or lower in energy than Cl···H(–NPt) hydrogen bonds.

Kinetics of complexation between crown ethers and protonated amines

1979 ◽  
Vol 20 (10) ◽  
pp. 911-914 ◽  
Author(s):  
F. de Jong ◽  
D.N. Reinhoudt ◽  
G.J. Torny
Keyword(s):  
Crown Ethers ◽  
Protonated Amines ◽  
Kinetics Of

Unimolecular fragmentation of some gaseous protonated amines

1986 ◽  
Vol 64 (8) ◽  
pp. 1652-1660 ◽  
Author(s):  
Eric J. Reiner ◽  
Raymond A. Poirier ◽  
Michael R. Peterson ◽  
Imre G. Csizmadia ◽  
Alex G. Harrison
Keyword(s):  
Mass Spectra ◽  
Chemical Ionization ◽  
Ionization Mass ◽  
Potential Energy Profile ◽  
Alkyl Amines ◽  
Alkyl Groups ◽  
Protonated Amines ◽  
Additional Barrier ◽  
Immonium Ions ◽  
Alkane Elimination

The proton-transfer chemical ionization mass spectra of the C3 to C5 monoalkyl amines as well as a number of di- and tri-alkyl amines have been determined using H3+ and (in some cases) HCO+ as protonating agent. The RNH3+ ions fragment to form alkyl ions R+ and eliminate alkenes to form NH4+. In addition, abundant immonium ions are observed in the CI mass spectra corresponding to elimination of alkane from RNH3+ or to direct alkide ion abstraction from RNH2; these ions serve to characterize the alkyl groups attached to the α-carbon atom of the amine. Although alkane elimination from RNH3+ is the thermochemically favoured reaction, only R+ and NH4+ are formed in decomposition of metastable RNH3+ ions. The potential energy profile for fragmentation of i-C3H7NH3+ has been calculated by abinitio molecular orbital methods. These calculations show that CH4 elimination has a large energy barrier additional to the reaction endothermicity while formation of NH4+ has only a small additional barrier and formation of C3H7+ has no barrier additional to the endothermicity. It is concluded that the immonium ions probably arise primarily by direct alkide ion abstraction reactions.

Effects of alkyl and fluoroalkyl substitution on the heterolytic and homolytic bond dissociation energies of protonated amines

1977 ◽  
Vol 99 (2) ◽  
pp. 326-330 ◽  
Author(s):  
R. H. Staley ◽  
M. Taagepera ◽  
W. G. Henderson ◽  
I. Koppel ◽  
J. L. Beauchamp ◽  
...  
Keyword(s):  
Bond Dissociation Energies ◽  
Bond Dissociation ◽  
Dissociation Energies ◽  
Protonated Amines

Gas-phase reactions of cyclopropenylidene with protonated alkyl amines

The Analyst ◽  
2016 ◽  
Vol 141 (8) ◽  
pp. 2412-2417 ◽  
Author(s):  
Ziqing Lin ◽  
Lei Tan ◽  
Yang Yang ◽  
Mingji Dai ◽  
František Tureček ◽  
...  
Keyword(s):  
Gas Phase ◽  
Gas Phase Reactions ◽  
Alkyl Amines ◽  
Protonated Amines ◽  
Proton Bound Dimer

Reactions of c-C3H2 with protonated amines are driven by its high gas-phase basicity, forming proton-bound dimer as the first step.

ChemInform Abstract: EFFECTS OF ALKYL AND FLUOROALKYL SUBSTITUTION ON THE HETEROLYTIC AND HOMOLYTIC BOND DISSOCIATION ENERGIES OF PROTONATED AMINES

1977 ◽  
Vol 8 (15) ◽  
pp. no-no
Author(s):  
R. H. STALEY ◽  
M. TAAGEPERA ◽  
W. G. HENDERSON ◽  
I. KOPPEL ◽  
J. L. BEAUCHAMP ◽  
...  
Keyword(s):  
Bond Dissociation Energies ◽  
Bond Dissociation ◽  
Dissociation Energies ◽  
Protonated Amines
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