Structures and Properties of beta-R3M (M = Si, Ge, Sn)- and beta-Chalcogenyl-substituted Carbenium Ions

Experimental and theoretical investigations into the manifestation of the γ-effect in 2- and 4-[2-silylethyl)]pyridines and pyridinium ions

Asimo Karnezis, Samuel C Brydon, Andrew Molino, David JD Wilson, Richard AJ O'Hair, Jonathan M White

2021-08-01

The γ-effect of the group 14 metals is a stabilizing interaction involving the back-lobe of the σC-M (M = Si, Ge, Sn, Pb) interact..

Computational Study of the Donor-Acceptor Interactions Underlying the Variable Oxygen Probe

Samuel C Brydon, Benjamin L Harris, Jonathan M White

2021-03-05

The variable oxygen probe (VOP) is a crystallographic technique that has been used to explore the relative donor abilities of vari..

Experimental and DFT Studies on the Identity Exchange Reactions between Phenyl Chalcogen Iranium Ions and Alkenes

Samuel C Brydon, Zhonghua Ren, Gabriel da Silva, S Fern Lim, George N Khairallah, Michael J Rathjen, Jonathan M White, Richard AJ O'Hair

2019-09-26

The gas-phase ion–molecule identity exchange reactions of phenyl chalcogen iranium ions with alkenes have been examined experiment..

Reactions of Thiiranium and Sulfonium Ions with Alkenes in the Gas Phase

Samuel C Brydon, Shea Fern Lim, George N Khairallah, Philippe Maitre, Estelle Loire, Gabriel da Silva, Richard AJ O'Hair, Jonathan M White

2019-08-16

Ion–molecule reactions between thiiranium ion 11 (m/z 213) and cyclohexene and cis-cyclooctene resulted in the formation of additi..

Seleniranium Ions Undergo pi-Ligand Exchange via an Associative Mechanism in the Gas Phase

S Fern Lim, Benjamin L Harris, George N Khairallah, EJ Bieske, Philippe Maitre, Gabriel da Silva, Brian D Adamson, Michael S Scholz, Neville JA Coughlan, Richard AJ O'Hair, Michael Rathjen, Daniel Stares, Jonathan M White

2017-06-16

Collision-induced dissociation mass spectrometry of the ammonium ions 4a and 4b results in the formation of the seleniranium ion 5..

The effects of sigma(C-Se)-pi hyperconjugation in 1-methoxy- and 1-nitro-4-[(phenylselanyl)methyl]benzene

Jonathan Michael White, Paul Blanc

2014-12-01

The structures of 1-methoxy-4-[(phenylselanyl)methyl]benzene, C14H14OSe, (1), and 1-nitro-4-[(phenylselanyl)methyl]benzene, C13H11..

Modes of Neighbouring Group Participation by the Methyl Selenyl Substituent in beta-Methylselenylmethyl-substituted 1-Phenylethyl Carbenium Ions

Benjamin L Harris, Jonathan M White

2013-10-01

Selenium substituents which are disposed β to an electron deficient centre, such as a carbocation p-orbital, or the π* orbital of ..

Hyperconjugation Involving Strained Carbon-Carbon Bonds. Structural Analysis of Ester and Ether Derivatives and One-Bond C-13-C-13 Coupling Constants of alpha- and beta-Nopinol

Shinn Dee Yeoh, Cohn E Skene, Jonathan M White

2013-01-18

σ(C-C)-σ*(C-O) interactions involving the strained carbon-carbon bonds of α- and β-nopinol, and their ester and ether derivatives ..

Hyperconjugation involving strained carbon-carbon bonds. Application of the variable oxygen probe to ester and ether derivatives of cubylmethanol

Benjamin Harris, G Paul Savage, Jonathan M White

2013-01-01

Application of the variable oxygen probe to derivatives of (4-methoxycarbonyl)cubylmethanol 11 demonstrated a strong response of C..

Structure Correlation Study of the Beckmann Rearrangement: X-ray Structural Analysis and C-13-C-13 1-Bond Coupling Constant Study of a Range of Cyclohexanone Oxime Derivatives

Shin Dee Yeoh, Benjamin L Harris, Tristan J Simons, Jonathan M White

2012-01-01

The X-ray structures of a range of oxime derivatives (1 and 4), of cyclohexanone and 4-tert-butylcyclohexanone, where the electron..

Solution and Gas-Phase Investigations of Trimethylsilylpropyl-Substituted Pyridinium Ions. Manifestation of the Silicon delta Effect

Asimo Karnezis, Richard AJ O'Hair, Jonathan M White

2011-11-14

Computational studies on the N-methyl-2-trimethyl- M-propylpyridinium ions 15a (M = Si), 15b (M = Ge), 15c (M = Sn), and 15d (M = ..

Orbital Interactions in Selenomethyl-Substituted Pyridinium Ions and Carbenium Ions with Higher Electron Demand

S Fern Lim, Benjamin L Harris, Paul Blanc, Jonathan M White

2011-03-18

Computational, solution phase, and crystal structure analysis of 2- and 4-organoselenylmethyl-substituted pyridinium ions (10a-c a..

Carbon-Germanium Hyperconjugation: Solid-State and Gas-Phase Investigations of (Trialkylgermyl)methyl-Substituted Pyridinium Ions

Asimo Karnezis, Richard AJ O'Hair, Jonathan M White

2009-11-23

A crystallographic and computational study on 2- and 4-((trialkylgermyl) methyl)pyridinium ions 7a-c and 8a-c provides evidence fo..

Desilylation of beta-Silyl Pyridinium Ions: Gas-Phase and Solution-Phase Studies in Conjunction with DFT Calculations

Asimo Karnezis, Richard AJ O'Hair, Jonathan M White

2009-08-10

Gas-phase chemistry of N-methyl 2- and 4-trimethylsilylmethylpyridinium ions 8 and 20 and the deuterated derivatives 17 and 21 was..

Structural investigations into the beta-effect of pentavalent silicon

Marisa Spiniello, Jonathan A White

2008-03-10

Ester and ether derivatives of 2-[(8-dimethylaminonaphthalen-1-yl) dimethylsilanyl]ethanol (10a) were prepared as part of a prelim..

Solution and solid-state structure of 2- and 4-bis(trimethylsilyl)methylpyridinium cations

Kathyrn Hassall, Carl H Schiesser, Jonathan M White

2007-06-18

N-Methylation of the 2- and 4-bis(trimethylsilyl)methyl pyridines 7 and 9 gives the ions 5 and 6 and results in a significant decr..

Carbon-silicon hyperconjugation and strain-enhanced hyperconjugation: Structures of N-methyl 2-and 4-tert-butyldimethylsilylmethyl pyridinium cations

Kathryn Hassall, Sofia Lobachevsky, Carl H Schiesser, Jonathan M White

2007-03-12

NBO analysis of the interaction of trialkylsilylmethyl substituents with the electron-deficient pyridinium cation suggests that hy..