Liquid injection field desorption/ionization of transition metal fluoride complexes

Dransfield, Trevor A.; Nazir, Ruqia; Perutz, Robin N.; Whitwood, Adrian C.

doi:10.1016/j.jfluchem.2010.05.008

Cited by 25 publications

(30 citation statements)

References 36 publications

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“…We reported the formation of the halogen‐bonded adduct D1⋅A1 and D1⋅A4 earlier . A2 – A4 were prepared according to known literature procedures . The study of A2 – A4 permits investigation of the influence of the substitution pattern of the fluoropyridyl ring on the energetics of the halogen bond formed with a range of organic donors ( D1 – D3 ) (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

Benchmarking of Halogen Bond Strength in Solution with Nickel Fluorides: Bromine versus Iodine and Perfluoroaryl versus Perfluoroalkyl Donors

Pike

Hunter

Brammer

et al. 2019

Chemistry A European J

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The energetics of halogen bond formation in solution have been investigated for a series of nickel fluoride halogen bond acceptors; trans‐[NiF(2‐C5NF4)(PEt3)2] (A1), trans‐[NiF{2‐C5NF3(4‐H)}(PEt3)2] (A2), trans‐[NiF{2‐C5NF3(4‐NMe2)}(PEt3)2] (A3) and trans‐[NiF{2‐C5NF2H(4‐CF3)}(PCy3)2] (A4) with neutral organic halogen bond donors, iodopentafluorobenzene (D1), 1‐iodononafluorobutane (D2) and bromopentafluorobenzene (D3), in order to establish the significance of changes from perfluoroaryl to perfluoroalkyl donors and from iodine to bromine donors. 19F NMR titration experiments have been employed to obtain the association constants, enthalpy, and entropy for the halogen bond formed between these donor‐acceptor partners in protiotoluene. For A2–A4, association constants of the halogen bonds formed with iodoperfluoroalkane (D2) are consistently larger than those obtained for analogous complexes with the iodoperfluoroarene (D1). For complexes formed with A2–A4, the strength of the halogen bond is significantly lowered upon modification of the halogen donor atom from I (in D1) to Br (in D3) (for D1: 5≤K285≤12 m−1, for D3: 1.0≤K193≤1.6 m−1). The presence of the electron donating NMe2 substituent on the pyridyl ring of acceptor A3 led to an increase in −ΔH, and the association constants of the halogen bond complexes formed with D1–D3, compared to those formed by A1, A2 and A4 with the same donors.

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Section: Resultsmentioning

confidence: 99%

Benchmarking of Halogen Bond Strength in Solution with Nickel Fluorides: Bromine versus Iodine and Perfluoroaryl versus Perfluoroalkyl Donors

Pike

Hunter

Brammer

et al. 2019

Chemistry A European J

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“…Comparable oxidative addition reactions at nickel bisphosphine moieties are known in the literature [6,26,27,[52][53][54]56]. Note that for the C-F activation step several mechanism have been discussed [3,6,26].…”

Section: Discussionmentioning

confidence: 95%

“…The structure which is proposed for 1 is supported by the 31 P{ 1 H}, 19 [6,23,27,28,[52][53][54][55][56][57]. The assignment of 1 as a 2-tetrafluoropyridyl nickel derivative is based on the presence of four signals of equal integration at d À86.0, À130.6, À151.8 and À174.0 in the 19 F NMR spectrum.…”

Section: C-f Activation At [Ni(cod) 2 ] In the Presence Of I Pr 2 Pchmentioning

confidence: 94%

Nickel fluoro complexes as intermediates in catalytic cross-coupling reactions

Breyer

Berger

Braun

et al. 2012

Journal of Fluorine Chemistry

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“…LIFDI offers major advantages over conventional FD as it allows for (1) sample transfer to the field emitter under inert conditions, and (2) reduced sample load that results in accelerated measurement cycles. LIFDI has been applied to the analysis of fullerene derivatives [17,18], transitions metal complexes [10,12,13], and other compounds highly reactive towards moisture and air [9,19].…”

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confidence: 99%

A Liquid Injection Field Desorption/Ionization-Electrospray Ionization Combination Source for a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Linden

Gross

2011

J. Am. Soc. Mass Spectrom.

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A new type of combination ion source has been devised. It unites two complementary ionization methods, i.e., liquid injection field desorption/ionization (LIFDI) and electrospray ionization (ESI). This LIFDI-ESI combination ion source has been constructed for a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. The LIFDI-ESI combination ion source can be switched between the LIFDI and ESI modes of operation within 15 min without breaking the vacuum. The source design and its operation are described. LIFDI-FT-ICR spectra of the ionic liquid trihexyl(tetradecyl)-phosphonium tris(pentafluoroethyl)-trifluorophosphate, polyethylene glycol 600, 2,3,4-tridodecyloxy-benzaldehyde, and [60]fullerene are described.

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Liquid injection field desorption/ionization of transition metal fluoride complexes

Cited by 25 publications

References 36 publications

Benchmarking of Halogen Bond Strength in Solution with Nickel Fluorides: Bromine versus Iodine and Perfluoroaryl versus Perfluoroalkyl Donors

Benchmarking of Halogen Bond Strength in Solution with Nickel Fluorides: Bromine versus Iodine and Perfluoroaryl versus Perfluoroalkyl Donors

Nickel fluoro complexes as intermediates in catalytic cross-coupling reactions

A Liquid Injection Field Desorption/Ionization-Electrospray Ionization Combination Source for a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

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