Fluorine···Fluorine Interactions in a High-Pressure Layered Phase of Perfluorobenzene

Michalina Rusek, Karolina Kwaśna, Armand Budzianowski, and Andrzej Katrusiak

DOI: 10.1021/acs.jpcc.9b09428

Synopsis

Several structures of hexafluorobenzene at low temperature at atmospheric pressure or high pressure at room temperature have been published.

There are also structures of the new high-pressure phase.

Continue reading

High-Pressure Behavior of Silver Fluorides up to 40 GPa

Adam Grzelak, Jakub Gawraczyński, Tomasz Jaroń, Dominik Kurzydłowski, Armand Budzianowski, Zoran Mazej, Piotr J. Leszczyński, Vitali B. Prakapenka, Mariana Derzsi, Viktor V. Struzhkin, Wojciech Grochala

INORGANIC CHEMISTRY, 
Volume 56, Issue 23, 4 December 2017, Pages 14651-14661
DOI: 10.1021/acs.inorgchem.7b02528

Synopsis

AgF2 with its Jahn−Teller-active Ag2+ cation undergoes pressure-induced phase transitions to unprecedented Pca21 and Pbcn polymorphs, not found for other metal difluorides (such as the CdF2 compared here).

Continue reading

Redetermination of crystal structure of Ag(II)SO4 and its high-pressure behavior up to 30GPa

Mariana Derzsi, Armand Budzianowski, Viktor V. Struzhkin, Przemysław J. Malinowski, Piotr J. Leszczyński, Zoran Mazejd and Wojciech Grochala

CrystEngComm, 2013,15, 192-198 DOI: 10.1039/C2CE26282G

Ag(II)SO4 up to 30GPa

Continue reading

Competing hydrogen-bonding patterns and phase transitions of 1,2-diaminoethane at varied temperature and pressure

 Armand Budzianowski Anna Olejniczak and Andrzej Katrusiak

Acta Crystallographica Section B
Structural Science
Volume 62, Part 6 (December 2006)
Acta Cryst. (2006). B62, 1078-1089 [doi:10.1107/S010876810602982X]

Abstract

1,2-Diaminoethane has been in-situ pressure- and temperature-frozen; apart from two known low-temperature phases, I[alpha] and II, three new phases, I[beta], I[gamma] and III, have been observed and their structures determined by X-ray diffraction. The measurements at 0.1MPa were carried out at 274, 243 and 224K, and 296K measurements were made at 0.15GPa (phase I[alpha]), at 0.3 and 1.1GPa (phase I[beta]), at 1.5GPa (phase I[gamma]), and at 0.2, 0.3 and 0.5 GPa (phase III). All these phases are monoclinic, space group P21/c, but the unit-cell dimension of phases I[alpha] and III are very different at 296 K: aI[alpha]=5.078(5), bI[alpha]=7.204(8), cI[alpha]=5.528(20)Å, [beta]I[alpha]=115.2(2)° at 0.15GPa, and aIII=5.10(3), bIII=5.212 (2), cIII=7.262 (12)Å, [beta]III = 111.6(4)° at 0.2GPa, respectively; in both phases Z=2. An ambient-pressure low-temperature phase II has been observed below 189K. Discontinuities in the unit-cell dimensions and in the N...N distance mark the isostructural transition between phases I[alpha] and I[beta] at 0.2GPa, which can be attributed to a damping process of the NH2 group rotations. In phase I[gamma] the unit-cell parameter a doubles and Z increases to 4. The molecule has inversion symmetry in all the structures determined. 1,2-Diaminoethane can be considered as a simple structural ice analogue, but with NH...N hydrogen bonds and with the H-atom donors (four in one molecule) in excess over H-atom acceptors (two per molecule). Thus, the transformations of 1,2-diaminoethane phases involving the conformational dynamics affect the hydrogen-bonding geometry and molecular association in the crystal. The 1,2-diaminoethane:1,2-dihydroxyethane mixture has been separated by pressure-freezing, and a solid 1,2-diaminoethane crystal in liquid 1,2-dihyroxyethane has been obtained.

Download:

High-pressure crystal phase of 1,2-ethylenediamine

Armand Budzianowski, Anna Olejniczak and Andrzej Katrusiak

Acta Crystallographica Section A
Foundations of Crystallography
Volume 61, (August 2005)
Acta Cryst. (2005). A61, c463

Download:

New Polar Phases of 1,4-Diazabicyclo[2.2.2]octane Perchlorate, An NH+···N Hydrogen-Bonded Ferroelectric

Anna Olejniczak, Michalina Anioła, Marek Szafrański, Armand Budzianowski and Andrzej Katrusiak

Cryst. Growth Des., 2013, 13 (7), pp 2872–2879 DOI: 10.1021/cg400276c

REPRINTED WITH PERMISSION FROM CRYST. GROWTH DES., 2013, 13 (7), PP 2872–2879 DOI: 10.1021/CG400276C. COPYRIGHT (2013) AMERICAN CHEMICAL SOCIETY.

Continue reading

High-Pressure Crystallographic Experiments with a CCD-Detector

Armand Budzianowski, Andrzej Katrusiak

High-Pressure Crystallography NATO Science Series Volume 140, 2004, pp 101-112
Proceedings of the NATO Advanced Study Institute, Erice, Italy, 4-15 June 2003
Series: Nato Science Series II: (closed), Vol. 140
Katrusiak, Andrzej, McMillan, Paul (Eds.)
DOI: 10.1007/978-1-4020-2102-2_7

Cover of the book: "High Pressure Crystallography" Eds.:. A. Katrusiak, P. McMillan

Cover of the book: „High Pressure Crystallography” Eds.:. A. Katrusiak, P. McMillan

ISBN: 978-1-4020-1954-8 (Print) 978-1-4020-2102-2 (Online)

Abstract

Association CH···π and No van der Waals Contacts at the Lowest Limits of Crystalline Benzene I and II Stability Regions

Andrzej Katrusiak, Marcin Podsiadło and Armand Budzianowski

Cryst. Growth Des., 2010, 10 (8), pp 3461–3465 DOI: 10.1021/cg1002594

Pressure phase transitions in beznene has been confirmed by crystal structures

REPRINTED WITH PERMISSION FROM CRYST. GROWTH DES., 2010, 10 (8), PP 3461–3465 DOI: 10.1021/CG1002594. COPYRIGHT (2010) AMERICAN CHEMICAL SOCIETY.

Continue reading

Pressure Tuning between NH···N Hydrogen-Bonded Ice Analogue and NH···Br Polar dabcoHBr Complexes

Armand Budzianowski and Andrzej Katrusiak

J. Phys. Chem. B, 2006, 110 (20), pp 9755–9758 DOI: 10.1021/jp061234t

Is it phase transition or reaction induced by pressure? (comments will be highly appreciated)

REPRINTED WITH PERMISSION FROM J. PHYS. CHEM. B, 2006, 110 (20), PP 9755–9758 DOI: 10.1021/JP061234T. COPYRIGHT (2006) AMERICAN CHEMICAL SOCIETY.

Continue reading