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Showing 1 to 12 of 334 entries
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Superacidic or not…? Synthesis, characterisation, and acidity of the room-temperature ionic liquid [C(CH3)3]+  [Al2Br7]-.

Chemistry (Weinheim an der Bergstrasse, Germany)

Scholz F, Himmel D, Scherer H, Krossing I.
PMID: 23180742
Chemistry. 2013 Jan 02;19(1):109-16. doi: 10.1002/chem.201203260. Epub 2012 Nov 23.

The room-temperature ionic liquid (RT-IL) [C(CH(3))(3)](+)[Al(2)Br(7)](-) (m.p. 2 °C) was generated by bromide abstraction from tert-butyl bromide with the Lewis acid aluminum bromide in the absence of solvent. The crystal structure of the tert-butyl cation salt was determined by...

Unified pH values of liquid chromatography mobile phases.

Analytical chemistry

Suu A, Jalukse L, Liigand J, Kruve A, Himmel D, Krossing I, Rosés M, Leito I.
PMID: 25664372
Anal Chem. 2015 Mar 03;87(5):2623-30. doi: 10.1021/ac504692m. Epub 2015 Feb 23.

This work introduces a conceptually new approach of measuring pH of mixed-solvent liquid chromatography (LC) mobile phases. Mobile phase pH is very important in LC, but its correct measurement is not straightforward, and all commonly used approaches have deficiencies....

From unsuccessful H2-activation with FLPs containing B(Ohfip)3 to a systematic evaluation of the Lewis acidity of 33 Lewis acids based on fluoride, chloride, hydride and methyl ion affinities.

Dalton transactions (Cambridge, England : 2003)

Böhrer H, Trapp N, Himmel D, Schleep M, Krossing I.
PMID: 25803574
Dalton Trans. 2015 Apr 28;44(16):7489-99. doi: 10.1039/c4dt02822h.

The possibility of obtaining frustrated Lewis pairs (FLPs) suitable for H2-activation based on the Lewis acid B(Ohfip)3 1 (Ohfip = OC(H)(CF3)2) was investigated. In this context, the crystal structure of 1 as well as the crystal structure of the...

Retinopathy and clinical outcomes in patients with type 2 diabetes mellitus, chronic kidney disease, and anemia.

BMJ open diabetes research & care

Bello NA, Pfeffer MA, Skali H, McGill JB, Rossert J, Olson KA, Weinrauch L, Cooper ME, de Zeeuw D, Rossing P, McMurray JJ, Solomon SD.
PMID: 25452859
BMJ Open Diabetes Res Care. 2014 Apr 06;2(1):e000011. doi: 10.1136/bmjdrc-2013-000011. eCollection 2014.

OBJECTIVE: Retinopathy is an established microvascular complication of type 2 diabetes mellitus (T2DM), but its independent relationship with macrovascular and other microvascular complications is less well defined across the spectrum of kidney disease in T2DM. We examined the prognostic...

Li[B(OCH2CF3)4]: synthesis, characterization and electrochemical application as a conducting salt for LiSB batteries.

Chemphyschem : a European journal of chemical physics and physical chemistry

Rohde M, Eiden P, Leppert V, Schmidt M, Garsuch A, Semrau G, Krossing I.
PMID: 25521464
Chemphyschem. 2015 Feb 23;16(3):666-75. doi: 10.1002/cphc.201402680. Epub 2014 Dec 17.

A new Li salt with views to success in electrolytes is synthesized in excellent yields from lithium borohydride with excess 2,2,2-trifluorethanol (HOTfe) in toluene and at least two equivalents of 1,2-dimethoxyethane (DME). The salt Li[B(OTfe)4 ] is obtained in...

Hexaazatrinaphthylenes with different twists.

Chemistry (Weinheim an der Bergstrasse, Germany)

Choudhary S, Gozalvez C, Higelin A, Krossing I, Melle-Franco M, Mateo-Alonso A.
PMID: 24323954
Chemistry. 2014 Feb 03;20(6):1525-8. doi: 10.1002/chem.201304071. Epub 2013 Dec 09.

A synthetic strategy that allows the induction of twist angles of different sizes in 5,6,11,12,17,18-hexaazatrinaphthylene (HATNA) chromophores is reported. The different twist angles are accompanied by measurable changes in the emission and electrochemical characteristics of HATNA.

The Acidity of the HBr/AlBr3 System: Stabilization of Crystalline Protonated Arenes and Their Acidity in Bromoaluminate Ionic Liquids.

Chemistry (Weinheim an der Bergstrasse, Germany)

Scholz F, Himmel D, Eisele L, Unkrig W, Martens A, Schlüter P, Krossing I.
PMID: 25808398
Chemistry. 2015 May 11;21(20):7489-502. doi: 10.1002/chem.201405952. Epub 2015 Mar 25.

Bulk protonated mesitylene, toluene, and benzene bromoaluminate salts were stabilized and characterized in the superacidic system HBr/n AlBr3 with NMR spectroscopy and X-ray analysis of [HC6 H3 (CH3 )3 ](+) [AlBr4 ](-) (1), [HC6 H5 (CH3 )](+) [AlBr4 ](-)...

Coordination Chemistry of Diiodine and Implications for the Oxidation Capacity of the Synergistic Ag(+) /X2 (X=Cl, Br, I) System.

Angewandte Chemie (International ed. in English)

Malinowski PJ, Himmel D, Krossing I.
PMID: 27411163
Angew Chem Int Ed Engl. 2016 Aug 01;55(32):9262-6. doi: 10.1002/anie.201603913. Epub 2016 Jul 13.

The synergistic Ag(+) /X2 system (X=Cl, Br, I) is a very strong, but ill-defined oxidant-more powerful than X2 or Ag(+) alone. Intermediates for its action may include [Agm (X2 )n ](m+) complexes. Here, we report on an unexpectedly variable...

Approaching the gas-phase structures of [AgS8]+ and [AgS16]+ in the solid state.

Chemistry (Weinheim an der Bergstrasse, Germany)

Cameron TS, Decken A, Dionne I, Fang M, Krossing I, Passmore J.
PMID: 12203319
Chemistry. 2002 Aug 02;8(15):3386-401. doi: 10.1002/1521-3765(20020802)8:15<3386::AID-CHEM3386>3.0.CO;2-9.

Upon treating elemental sulfur with [AgSbF(6)], [AgAl(hfip)(4)], [AgAl(pftb)(4)] (hfip=OCH(CF(3))(2), pftb =OC(CF(3))(3)) the compounds [Ag(S(8))(2)][SbF(6)] (1), [AgS(8)][Al(hfip)(4)] (2), and [Ag(S(8))(2)](+)[[Al(pftb)(4)](-) (3) formed in SO(2) (1), CS(2) (2), or CH(2)Cl(2) (3). Compounds 1-3 were characterized by single-crystal X-ray structure determinations: 1...

P(5)X(2)(+) (X=Br, I), a Phosphorus-Rich Binary P-X Cation with a C(2v)-Symmetric P(5) Cage This work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie. We thank Prof. H. Schnöckel for valuable discussions. .

Angewandte Chemie (International ed. in English)

Krossing I, Raabe I.
PMID: 12404430
Angew Chem Int Ed Engl. 2001 Dec 03;40(23):4406-4409. doi: 10.1002/1521-3773(20011203)40:23<4406::aid-anie4406>3.0.co;2-x.

No abstract available.

Thermal hysteresis in dithiadiazolyl and dithiazolyl radicals induced by supercooling of paramagnetic liquids close to room temperature: a study of F3CCNSSN and an interpretation of the behaviour of F3CCSNSCCF3.

Chemical communications (Cambridge, England)

Du H, Haddon RC, Krossing I, Passmore J, Rawson JM, Schriver MJ.
PMID: 12271633
Chem Commun (Camb). 2002 Sep 07;(17):1836-7. doi: 10.1039/b202627a.

The trifluoromethyl-substituted dithiadiazolyl and dithiazolyl radicals, F3CCNSSN (1) and F3CCSNSCCF3 (2) associate through pi*-pi* covalent and electrostatic S delta+...N delta- interactions in the solid state, but melt with a dramatic volume increase to generate paramagnetic liquids; these radicals exhibit...

A theoretical study on the formation of EX4+ and E2X5+(E = P, As; X = Br, I) from Ag+ and EX3/X2.

Dalton transactions (Cambridge, England : 2003)

Gonsior M, Krossing I.
PMID: 15909054
Dalton Trans. 2005 Jun 07;(11):2022-30. doi: 10.1039/b503088a. Epub 2005 May 10.

The mechanism and the thermodynamics of the formation of EX2+, EX4+ and E2X5+ (E = As, P; X = Br, I) was carefully analyzed with MP2/TZVPP calculations and inclusion of entropy and solvation effects (COSMO model approximating CH2Cl2). Thus,...

Showing 1 to 12 of 334 entries