D
David R. Armstrong
Researcher at University of Strathclyde
Publications - 212
Citations - 4539
David R. Armstrong is an academic researcher from University of Strathclyde. The author has contributed to research in topics: Ab initio & Crystal structure. The author has an hindex of 35, co-authored 207 publications receiving 4223 citations. Previous affiliations of David R. Armstrong include University of Cambridge.
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Bond indices and valency
TL;DR: In this article, the density matrix results of CNDO self-consistent field molecular orbital calculations are correlated with chemists' ideas of valency, and both the valencies of atoms and the anisotropy of an atom in a given environment are derived quantitatively.
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Sodium hydrotris(methimazolyl)borate, a novel soft, tridentate ligand: preparation, structure and comparisons with sodium hydrotris(pyrazolyl)borate†
TL;DR: The hydrotris(methimazolyl)borate anion (Tm), a soft analogue of the pyrazolyl borate ion (Tp), has been synthesized in this paper.
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Sodium dialkyl-amidozincates : Alkyl or amido bases? An experimental and theoretical case study
Prokopis C. Andrikopoulos,David R. Armstrong,Helen R. L. Barley,William Clegg,Sophie H. Dale,Eva Hevia,Gordon W. Honeyman,and Alan R. Kennedy,Robert E. Mulvey +8 more
TL;DR: This new zincate was synthesized from a 1:1:1 mixture of tBu2Zn, NaTMP, and TMEDA in hexane solution, as a colorless crystalline solid in an isolated yield of 58% and has been characterized in solution by 1H and 13C NMR spectroscopic studies.
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Directed meta‐Metalation Using Alkali‐Metal‐Mediated Zincation
David R. Armstrong,William Clegg,Sophie H. Dale,Eva Hevia,Lorna M. Hogg,Gordon W. Honeyman,Robert E. Mulvey +6 more
TL;DR: In this article, a deprotonative metalation is used to transform a carbon-hydrogen bond of an organic compound into a more useful, more reactive carbon-metal bond, which can then be treated with an electrophile to create a new carbon-carbon or carbon-heteroatom bond.
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A homologous series of regioselectively tetradeprotonated group 8 metallocenes: new inverse crown ring compounds synthesized via a mixed sodium-magnesium tris(diisopropylamide) synergic base.
Prokopis C. Andrikopoulos,David R. Armstrong,William Clegg,Carly J. Gilfillan,Eva Hevia,Alan R. Kennedy,Robert E. Mulvey,Charles T. O'Hara,John Parkinson,Duncan M. Tooke +9 more
TL;DR: Variable-temperature NMR spectroscopic studies indicate that 1, 2, and 3 each exist as two distinct interconverting conformers in arene solution, the rates of exchange of which have been calculated using coalescence and EXSY NMR measurements.