Benzene and borazine, so different, yet so similar: insight from experimental charge density analysis

MR Merino-García, LA Soriano-Agueda… - Inorganic …, 2022 - ACS Publications
Although benzene and borazine are isoelectronic and isostructural, they have very different
electronic structures, mainly due to the polar nature of the B–N bond. Herein, we present an …

Hirshfeld Atom Refinement of Metal–Organic Complexes: Treatment of Hydrogen Atoms Bonded to Transition Metals

M Woińska, S Pawlędzio… - The Journal of …, 2023 - ACS Publications
Hydrogen positions in hydrides play a key role in hydrogen storage materials and high-
temperature superconductors. Our recently published study of five crystal structures of …

Current developments and trends in quantum crystallography

A Krawczuk, A Genoni - Structural Science, 2024 - journals.iucr.org
Quantum crystallography is an emerging research field of science that has its origin in the
early days of quantum physics and modern crystallography when it was almost immediately …

Enhancing hydrogen positions in X-ray structures of transition metal hydride complexes with dynamic quantum crystallography

M Woińska, AA Hoser, ML Chodkiewicz, K Woźniak - IUCrJ, 2024 - journals.iucr.org
Hirshfeld atom refinement (HAR) is a method which enables the user to obtain more
accurate positions of hydrogen atoms bonded to light chemical elements using X-ray data …

[HTML][HTML] The effects of experimentally obtained electron correlation and polarization on electron densities and exchange-correlation potentials

E Hupf, F Kleemiss, T Borrmann, R Pal… - The Journal of …, 2023 - pubs.aip.org
In X-ray constrained wavefunction (XCW) fitting, external information, such as electron
correlation and polarization, is included into a single-determinantal isolated-molecule …

Aurophilic Interactions Studied by Quantum Crystallography

S Pawlȩdzio, M Malinska, F Kleemiss… - Inorganic …, 2022 - ACS Publications
This is the first use of a wave-function-based crystallographic method to characterize
aurophilic interactions from X-ray diffraction data. Theoretical calculations previously …

Influence of modelling disorder on Hirshfeld atom refinement results of an organo-gold (I) compound

S Pawlędzio, M Malinska, F Kleemiss, S Grabowsky… - IUCrJ, 2022 - journals.iucr.org
Details of the validation of disorder modelling with Hirshfeld atom refinement (HAR) for a
previously investigated organo-gold (I) compound are presented here. The impact of refining …

Refinement of X-ray and electron diffraction crystal structures using analytical Fourier transforms of Slater-type atomic wavefunctions in Olex2

F Kleemiss, N Peyerimhoff… - Applied …, 2024 - journals.iucr.org
An implementation of Slater-type spherical scattering factors for X-ray and electron
diffraction for elements in the range Z= 1–103 is presented within the software Olex2. Both …

Influence of N-protonation on electronic properties of acridine derivatives by quantum crystallography

S Pawlędzio, M Ziemniak, D Trzybiński… - RSC …, 2024 - pubs.rsc.org
Applications of 9-aminoacridine (9aa) and its derivatives span fields such as chemistry,
biology, and medicine, including anticancer and antimicrobial activities. Protonation of such …

X-ray wavefunction refinement and comprehensive structural studies on bromo-substituted analogues of 2-deoxy-d-glucose in solid state and solution

M Ziemniak, S Pawlędzio, A Zawadzka-Kaźmierczuk… - RSC …, 2022 - pubs.rsc.org
The structural studies on two bromo-substituted derivatives of 2-deoxy-D-glucose (2-DG),
namely 2-deoxy-2-bromo-D-glucose (2-BG) and 2-deoxy-2-bromo-D-mannose (2-BM) are …