Gerken, Michael

 

Recent Submissions

  • Nieboer, Jared; Haiges, Ralf; Hillary, William; Yu, Xin; Richardet, Tyler; Mercier, Hélène P. A.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeUniversity of Southern CaliforniaMcMaster Universityhttps://doi.org/10.1021/ic3005882, 2012)
    The new [N(CH3)4][WSF5] salt was synthesized by two preparative methods: (a) by reaction of WSF4 with [N(CH3)4][F] in CH3CN and (b) directly from WF6 using the new sulfide-transfer reagent [N(CH3)4][SSi(CH3)3]. The ...
  • Goettel, James T.; Turnbull, Douglas; Gerken, Michael (ElsevierArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1016/j.jfluchem.2014.07.001, 2015)
    Sulfur tetrafluoride is a reagent for the one-step syntheses of [ReVIIO2F4]−, [IVOF4]−, and [IVIIO2F4]− salts. Pure Ag[ReO2F4] as well as its CH3CN coordination compounds were obtained from CH3CN solvent. The Ag[ReO2F4], ...
  • Chaudhary, Praveen; Bieringer, Mario; Hazendonk, Paul; Gerken, Michael (Royal Society of ChemistryArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine TechnologiesUniversity of Manitobahttps://doi.org/10.1039/C5DT01994J, 2015)
    The solid-state structure of (CH3)3SnF was reinvestigated by X-ray diffraction techniques as well as by multi-nuclear solid-state NMR spectroscopy. Trimethyltin fluoride crystallizes from hot ethanol in the orthorhombic ...
  • Goettel, James T.; Kostiuk, Nathan; Gerken, MIchael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1021/acs.inorgchem.6b01112, 2016)
    Adducts between SF4 and a nitrogen base are easily solvolyzed by HF, yielding the protonated nitrogen base and fluoride. Salts resulting from the solvolysis of SF4·NC5H5, SF4·NC5H4(CH3), SF4·NC5H3(CH3)2, and SF4·NC5H4N(CH3)2 ...
  • Majumdar, R. Dutta; Bake, K. D.; Ratna, Y.; Pomerantz, A. E.; Mullins, O. C.; Gerken, Michael; Hazendonk, Paul (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryCanadian Centre for Research in Advanced Fluorine TechnologiesSchlumberger-Doll ResearchUniversity of Lethbridgehttps://doi.org/10.1021/acs.energyfuels.5b02815, 2016)
    Using solid-state 13C NMR spectroscopy of two different asphaltenes, one derived from petroleum and the other from coal liquids, it was shown that the asphaltene molecular architecture consists of a spectrum of sizes, ...
  • Goettel, James T.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://doi.org/10.1021/acs.inorgchem.6b02373, 2016)
    Lewis acid–base adducts between SF4 and the oxygen bases tetrahydrofuran, cyclopentanone, and 1,2-dimethoxyethane were synthesized and characterized by Raman spectroscopy and X-ray crystallography. Crystal structures of ...
  • Turnbull, Douglas; Wetmore, Stacey D.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryCanadian Centre for Research in Advanced Fluorine TechnologiesUniversity of Lethbridgehttps://doi.org/10.1021/acs.inorgchem.7b02048, 2017)
    Convenient preparative routes to fluorido[(pentafluorophenyl)imido]tungstate(VI) salts have been developed. The reaction of WF6·NC5H5 or [N(CH3)4][WF7] with C6F5NH2 results in quantitative formation of the C5H5NH+ or ...
  • Turnbull, Douglas; Kostiuk, Nathan; Wetmore, Stacey D.; Gerken, Michael (ElsevierArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1016/j.jfluchem.2018.08.007, 2018)
    The reactions of WF6 with pyridine, 4-methylpyridine, 4-(dimethylamino)pyridine, and 4,4′-bipyridine (4,4′-bipy) in CH2Cl2 afford the Lewis-acid-base adducts WF6(4-NC5H4R) (R = H, CH3, N(CH3)2) and F6W(4,4′-bipy)WF6 as ...
  • Stuart, Daniel; Wetmore, Stacey D.; Gerken, Michael (ElsevierArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1016/j.jfluchem.2019.02.011, 2019)
    Lewis acid-base adducts between AsF5 and the ketones, acetone, cyclopentanone, and adamantanone, were synthesized from SO2 and CH2Cl2 solutions. These adducts, which contain O---As pnictogen bonding interactions, were found ...
  • Turnbull, Douglas; Wetmore, Stacey D.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1021/acs.inorgchem.9b00574, 2019)
    Amorphous [W(NC6F5)F4]x has been synthesized by the reaction of [C5H5NH][W(NC6F5)F5] with AsF5 in CH2Cl2. The reaction of [W(NC6F5)F4]x with CH3CN yields monomeric W(NC6F5)F4(NCCH3), whereas reaction with a sub-2-fold ...
  • Turnbull, Douglas; Hazendonk, Paul; Wetmore, Stacey D. (WileyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1002/chem.202000424, 2020)
    The enhanced reactivity of [WF5]+ over WF6 has been exploited to access a neutral derivative of elusive WF5. The reaction of WF6(NC5H5)2 with [(CH3)3Si(NC5H5)][O3SCF3] in CH2Cl2 results in quantitative formation of ...
  • Kostiuk, Nathan; Goettel, James T.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://doi.org/10.1021/acs.inorgchem.0c01105, 2020)
    Chalcogen-bonding interactions of SF4 with the polycyclic amines DABCO (C6H12N2) and HMTA (C6H12N4) were studied by low-temperature Raman spectroscopy and X-ray crystallography, revealing the 2:1 adducts C6H12N2·2SF4 and ...
  • Turnbull, Douglas; Chaudhary, Praveen; Leenstra, Dakota; Hazendonk, Paul; Wetmore, Stacey D. (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeCanadian Centre for Research in Advanced Fluorine Technologieshttps://dx.doi.org/10.1021/acs.inorgchem.0c02783?ref=pdf, 2020)
    The structure of [WOF4]4 has been reinvestigated by low-temperature X-ray crystallography and DFT (MN15/def2- SVPD) studies. Whereas the W4F4 ring of the tetramer is planar and disordered in the solid state, the optimized ...
  • Song, Chao; Chu, Xianxu; Zhu, Bifeng; Gerken, Michael; Zeng, Xiaoqing (ElsevierArts and ScienceDepartment of Chemistry and BiochemistrySoochow UniversityFudan UniversityUniversity of Lethbridgehttps://doi.org/10.1016/j.jfluchem.2020.109694, 2021)
    Two fluorine-substituted phosphoryl pseudohalides including the highly explosive diazide FP(O)(N3)2 and dii-socyanate FP(O)(NCO)2 have been synthesized and fully characterized with IR (gas-phase and noble-gas matrices), ...
  • Goettel, James T.; Kostiuk, Nathan; Gerken, Michael (WileyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://doi.org/10.1002/anie.201302917, 2013)
    Solved at last: The crystal structure of solid SF4, which has a melting point of −121 °C, has been obtained. It exhibits weak intermolecular S⋅⋅⋅F interactions. A similar structural motif was observed within a layer of SF4 ...
  • Stuart, Daniel; Wetmore, Stacey D.; Gerken, Michael (WileyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://doi.org/10.1002/anie.201710263, 2017)
    Protonated carbonyl compounds have been invoked as intermediates in many acid-catalyzed organic reactions. To gain key structural and electronic data about such intermediates, oxonium salts derived from five representative ...
  • Turnbull, Douglas; Wetmore, Stacey D.; Gerken, Michael (WileyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://doi.org/10.1002/anie.201906600, 2019)
    Transition-metal hexafluorides do not exhibit fluoride-ion donor properties in the absence of donor ligands. We report the first synthesis of donor-stabilized [MF5]+ derived from a transition-metal hexafluoride via ...
  • Turnbull, Douglas; Chaudhary, Praveen; Hazendonk, Paul; Wetmore, Stacey D.; Gerken, Michael (American Chemical SocietyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://dx.doi.org/10.1021/acs.inorgchem.0c03679?ref=pdf, 2021)
    The Lewis-acid behavior of [SF3][MF6] (M = Sb, As) salts toward mono- and bidentate nitrogen bases was explored. Reactions of [SF3][MF6] with excesses of CH3CN and C5H5N yielded [SF3(L)2]+ (L = CH3CN, C5H5N) salts, whereas ...
  • Chaudhary, Praveen; Goettel, James T.; Mercier, Hélène P. A.; Sowlati-Hashjin, Shahin; Hazendonk, Paul; Gerken, Michael (WileyArts and ScienceDepartment of Chemistry and BiochemistryUniversity of LethbridgeMcMaster Universityhttps://doi.org/10.1002/chem.201406359, 2015)
    Sulfur tetrafluoride was shown to act as a Lewis acid towards organic nitrogen-bases, such as pyridine, 2,6-dimethylpyridine, 4-methylpyridine, and 4-dimethylaminopyridine. The SF4·NC5H5, SF4·2,6-NC5H3(CH3)2, ...
  • Turnbull, Douglas; Gerken, MIchael (Arts and ScienceDepartment of Chemistry and BiochemistryUniversity of Lethbridgehttps://doi.org/10.1107/S2056989020009767, 2020)
    Crystals of 1,10-phenanthrolinium penta­fluorido­oxidotungstate(VI), (1,10-phen-H)[WOF5] (1,10-phen = 1,10-phenanthroline, C12H8N2), were obtained upon hydrolysis of WF6(1,10-phen) in CH3CN at 193 K. The (1,10-phen-H)[WOF5] ...