Electronic Structure and Effectively Unpaired Electron Density Topology in closo-Boranes: Nonclassical Three-Center Two-Electron Bonding.

J Chem Theory Comput

Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco , Apartado 644, E-48080 Bilbao, Spain.

Published: April 2011

This article provides a detailed study of the structure and bonding in closo-borane cluster compounds X2B3H3 (X = BH(-), P, SiH, CH, N), with particular emphasis on the description of the electron distribution using the topology of the quantum many-body effectively unpaired density. The close relationship observed between the critical points of this quantity and the localization of the electron cloud allows us to characterize the nonclassical bonding patterns of these systems. The obtained results confirm the suitability of the local rule to detect three-center two-electron bonds, which was conjectured in our previous study on boron hydrides.

Download full-text PDF

Source
http://dx.doi.org/10.1021/ct100753qDOI Listing

Publication Analysis

Top Keywords

effectively unpaired
8
three-center two-electron
8
electronic structure
4
structure effectively
4
unpaired electron
4
electron density
4
density topology
4
topology closo-boranes
4
closo-boranes nonclassical
4
nonclassical three-center
4

Similar Publications

Traditional numerical reconstruction methods in digital holography (DH) are faced with problems such as inaccurate and time-consuming unwrapping or the need to capture multiple holograms with different diffraction distances. In recent years, deep learning, believed to be a new and effective optimization tool, has been widely used in digital holography. However, most supervised deep learning methods require large-scale paired data, and their preparation is time-consuming and laborious.

View Article and Find Full Text PDF

Background: This cross-sectional study aimed to compare the composition of the submucosal microbiome of peri-implantitis with paired and unpaired healthy implant samples.

Methods: We evaluated submucosal plaque samples obtained in 39 cases, including 13 cases of peri-implantitis, 13 cases involving healthy implants from the same patient (paired samples), and 13 cases involving healthy implants from different individuals (unpaired samples). The patients were evaluated using next-generation genomic sequencing (Illumina) based on 16S rRNA gene amplification.

View Article and Find Full Text PDF

Background: The global incidence of high myopia is increasing, with projections indicating a rise from 3 to 10% of the global population by 2050. Effective treatment options exist to reduce myopia progression, but their success is contingent on patient adherence. This study assesses the impact of changes in treating physicians on adherence to therapy to control myopia progression.

View Article and Find Full Text PDF

The Effect of Cognitive-Motor Dual Tasks on the Risk of Falls in Female Saudi Students: A Cross-Sectional Study.

Risk Manag Healthc Policy

January 2025

Department of Medical Rehabilitation Science, Faculty of Applied Medical Sciences, Umm Al-Qura University-Makkah-Saudi Arabia; Cairo University, Cairo, Egypt.

Introduction: Dual tasking (DT) requires individuals to carry out two actions simultaneously, comparable to how the brain can perform a cognitive function while the body is in motion, which eventually enhances human balance. This paper aims to examine and compare the impact of DT on the risk of falling (ROF) among Saudi female students.

Methods: A cross-sectional design was used.

View Article and Find Full Text PDF

Introduction According to the World Health Organization (WHO), cardiovascular diseases are the leading cause of death globally, accounting for approximately 17 million deaths annually, with sudden cardiac arrest (SCA) as a significant contributor to this alarming statistic. SCA, the abrupt loss of heart function, is a critical medical emergency that requires early recognition and immediate cardiopulmonary resuscitation (CPR) for the effective resuscitation of victims. Various studies have shown a low level of knowledge regarding CPR in the community.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!