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. 2018 Sep 11;54(70):9849-9852.
doi: 10.1039/c8cc05430d. Epub 2018 Aug 16.

Unexpected behaviour in derivatives of Barluenga's reagent, Hal(Coll)2X (Coll = 2,4,6-trimethyl pyridine, collidine; Hal = I, Br; X = PF6, ClO4 & BF4)

Lewis C F Morgan  1 , Yejin Kim  1 , Jack N Blandy  2 , Claire A Murray  3 , Kirsten E Christensen  1 , Amber L Thompson  1
Affiliations

Unexpected behaviour in derivatives of Barluenga's reagent, Hal(Coll)2X (Coll = 2,4,6-trimethyl pyridine, collidine; Hal = I, Br; X = PF6, ClO4 & BF4)

Lewis C F Morgan et al. Chem Commun (Camb). .

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.

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