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Unexpected behaviour in derivatives of barluenga's reagent, Hal Coll 2 X (Coll = 2,4,6-trimethyl pyridine, collidine; Hal = I, Br; X = PF 6 , ClO 4 & BF 4 )

DOI: 10.1039/C8CC05430D DOI Help

Authors: Lewis C. F. Morgan (University of Oxford) , Yejin Kim (University of Oxford) , Jack N. Blandy (University of Oxford) , Claire A. Murray (Diamond Light Source) , Kirsten Christensen (University of Oxford) , Amber L. Thompson (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemical Communications

State: Published (Approved)
Published: August 2018
Diamond Proposal Number(s): 18324 , 13639

Abstract: For the collidine analogues of Barluenga's Reagent (IPy2BF4) reported, a flat cation is necessary for the generation of a modulated phase, in keeping with the ``Ratchet Model'' theory [Kim et al., Crystal Growth & Design, 2014, 14, 6294]. Attempts to study "diffuse modulation" in Br(Coll)2ClO4 have shown that these non-Bragg features disappear very rapidly on exposure to synchrotron radiation, an effect thought to be caused by the radiation damage disrupting the lattice vibrations that cause the modulation.

Subject Areas: Chemistry


Instruments: I11-High Resolution Powder Diffraction , I19-Small Molecule Single Crystal Diffraction