A simple model for calculating atomic charges in molecules

We propose a new atomic-charge analysis, termed adjusted charge partitioning (ACP) scheme. To partition the molecular electronic density into atomic components, weighting factors cAr2n-2exp(-αAr) with atomic parameters cA and αA are used. Extensive numerical tests were performed for 540 molecules containing 17 main-group elements H, Li to F, Na to Cl, Br, and I. The estimated dipole moments and atomic charges are compared with the data provided by a large number of alternative atomic-charge schemes including the Mulliken, Löwdin, Hirshfeld, Hirshfeld Iterative, CM5, ESP, NPA, and QTAIM population analyses. These tests show that the resulting atomic charges are insensitive to basis sets used, chemically consistent and accurately reproduce experimental dipole moments. © 2018 the Owner Societies.

Авторы
Voityuk A.A.1, 2 , Stasyuk A.J.2 , Vyboishchikov S.F. 2, 3
Номер выпуска
36
Язык
Английский
Страницы
23328-23337
Статус
Опубликовано
Том
20
Год
2018
Организации
  • 1 Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig de Lluís Companys 23, Barcelona, 08010, Spain
  • 2 Institut de Química Computacional i Catàlisi, Departament de Química, Universitat de Girona, Carrer Maria Aurèlia Capmany, Girona, 17003, Spain
  • 3 Peoples' Friendship University of Russia, RUDN University, 6 Miklukho-Maklay Street, Moscow, 117198, Russian Federation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/7173/
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