Journal ArticleDOI
Bond orbitals from chemical valence theory
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TLDR
The approach presented here allows for a discussion of localized orbitals and bond multiplicity within one common framework of chemical valence theory.Abstract:
Two sets of orbitals are derived, directly connected to the Nalewajski-Mrozek valence and bond-multiplicity indices: Localized Orbitals from the Bond-Multiplicity Operator (LOBO) and the Natural Orbitals for Chemical Valence (NOCV). LOBO are defined as the eigenvectors of the bond-multiplicity operator. The expectation value of this operator is the corresponding bond index. Thus, the approach presented here allows for a discussion of localized orbitals and bond multiplicity within one common framework of chemical valence theory. Another set of orbitals discussed in the present work, NOCV, are defined as eigenvectors of the overall chemical valence operator. This set of orbitals can be especially useful for a description of bonding in transition metal complexes, as it allows for separation of the deformation density contributions originating from the ligand --> metal donation and metal --> ligand back-donation.read more
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A Combined Charge and Energy Decomposition Scheme for Bond Analysis
TL;DR: The ETS-NOCV scheme offers a compact, qualitative, and quantitative picture of the chemical bond formation within one common theoretical framework and can be widely used for the description of different types of chemical bonds.
Journal ArticleDOI
Halogen Bonding in Supramolecular Chemistry.
Lydia C. Gilday,Sean W. Robinson,Timothy A. Barendt,Matthew J. Langton,Benjamin R. Mullaney,Paul D. Beer +5 more
Journal ArticleDOI
Intrinsic Atomic Orbitals: An Unbiased Bridge between Quantum Theory and Chemical Concepts.
TL;DR: An exceptionally simple algebraic construction allows for defining atomic core and valence orbitals, polarized by the molecular environment, which can exactly represent self-consistent field wave functions, providing an unbiased and direct connection between quantum chemistry and empirical chemical concepts.
Journal ArticleDOI
What is NBO analysis and how is it useful
TL;DR: Natural bond orbital (NBO) analysis is one of many available options for translating computational solutions of Schrodinger's wave equation into the familiar language of chemical bonding concepts as discussed by the authors.
Journal ArticleDOI
Software for the frontiers of quantum chemistry: An overview of developments in the Q-Chem 5 package
Evgeny Epifanovsky,Andrew T.B. Gilbert,Andrew T.B. Gilbert,Xintian Feng,Xintian Feng,Joonho Lee,Yuezhi Mao,Narbe Mardirossian,Narbe Mardirossian,Pavel Pokhilko,Alec F. White,Marc P. Coons,Adrian L. Dempwolff,Zhengting Gan,Diptarka Hait,Paul R. Horn,Leif D. Jacobson,Ilya Kaliman,Jörg Kussmann,Adrian W. Lange,Ka Un Lao,Daniel S. Levine,Jie Liu,Jie Liu,Simon C. McKenzie,Adrian F. Morrison,Kaushik D. Nanda,Felix Plasser,Felix Plasser,Dirk R. Rehn,Marta L. Vidal,Zhi-Qiang You,Zhi-Qiang You,Ying Zhu,Bushra Alam,Benjamin J. Albrecht,Abdulrahman Aldossary,Ethan Alguire,J. Andersen,Vishikh Athavale,Dennis Barton,Khadiza Begam,Andrew Behn,Nicole Bellonzi,Yves A. Bernard,Eric J. Berquist,Hugh G. A. Burton,Abel Carreras,Kevin Carter-Fenk,Romit Chakraborty,Romit Chakraborty,Alan D. Chien,Kristina D. Closser,Vale Cofer-Shabica,Saswata Dasgupta,Marc de Wergifosse,Jia Deng,Michael Diedenhofen,Hainam Do,Sebastian Ehlert,Po Tung Fang,Shervin Fatehi,Shervin Fatehi,Shervin Fatehi,Qingguo Feng,Triet Friedhoff,James R. Gayvert,Qinghui Ge,Gergely Gidofalvi,Matthew Goldey,Joseph Gomes,Cristina E. González-Espinoza,Sahil Gulania,Anastasia O. Gunina,Magnus W. D. Hanson-Heine,Phillip H.P. Harbach,Andreas W. Hauser,Michael F. Herbst,Michael F. Herbst,Mario Hernández Vera,Manuel Hodecker,Zachary C. Holden,Shannon E. Houck,Xunkun Huang,Kerwin Hui,Bang C. Huynh,Maxim V. Ivanov,Ádám Jász,Hyunjun Ji,Hanjie Jiang,Benjamin Kaduk,Sven Kähler,Kirill Khistyaev,Jae-Hoon Kim,Gergely Kis,Phil Klunzinger,Zsuzsanna Koczor-Benda,Joong Hoon Koh,Dimitri Kosenkov,Laura Koulias,Tim Kowalczyk,Tim Kowalczyk,Caroline M. Krauter,Karl Y Kue,Alexander A. Kunitsa,Thomas Kus,István Ladjánszki,Arie Landau,Keith V. Lawler,Daniel Lefrancois,Susi Lehtola,Susi Lehtola,Run R. Li,Yi-Pei Li,Jiashu Liang,Marcus Liebenthal,Hung Hsuan Lin,You Sheng Lin,Fenglai Liu,Kuan-Yu Liu,Matthias Loipersberger,Arne Luenser,Aaditya Manjanath,Prashant Uday Manohar,Erum Mansoor,Sam F. Manzer,Shan Ping Mao,Aleksandr V. Marenich,Thomas Markovich,Stephen E. Mason,Simon A. Maurer,Peter F. McLaughlin,Maximilian F. S. J. Menger,Jan-Michael Mewes,Stefanie A. Mewes,Pierpaolo Morgante,J. Wayne Mullinax,Katherine J. Oosterbaan,Katherine J. Oosterbaan,Garrette Paran,Garrette Paran,Alexander C. Paul,Suranjan K. Paul,Fabijan Pavošević,Zheng Pei,Stefan Prager,Emil Proynov,Ádám Rák,Eloy Ramos-Cordoba,Bhaskar Rana,Alan E. Rask,Adam Rettig,Ryan M. Richard,Fazle Rob,Elliot Rossomme,Tarek Scheele,Maximilian Scheurer,Matthias Schneider,Nickolai Sergueev,Shaama Mallikarjun Sharada,Wojciech Skomorowski,David W. Small,Christopher J. Stein,Yu-Chuan Su,Eric J. Sundstrom,Zhen Tao,Jonathan Thirman,Gábor János Tornai,Takashi Tsuchimochi,Norm M. Tubman,Srimukh Prasad Veccham,Oleg A. Vydrov,Jan Wenzel,Jon Witte,Atsushi Yamada,Kun Yao,Sina Yeganeh,Shane R. Yost,Alexander Zech,Igor Ying Zhang,Xing Zhang,Yu Zhang,Dmitry Zuev,Alán Aspuru-Guzik,Alexis T. Bell,Nicholas A. Besley,Ksenia B. Bravaya,Bernard R. Brooks,David Casanova,Jeng-Da Chai,Sonia Coriani,Christopher J. Cramer,György Cserey,A. Eugene DePrince,Robert A. DiStasio,Andreas Dreuw,Barry D. Dunietz,Thomas R. Furlani,William A. Goddard,Sharon Hammes-Schiffer,Teresa Head-Gordon,Warren J. Hehre,Chao-Ping Hsu,Chao-Ping Hsu,Thomas-C. Jagau,Thomas-C. Jagau,Yousung Jung,Andreas Klamt,Jing Kong,Daniel S. Lambrecht,WanZhen Liang,WanZhen Liang,Nicholas J. Mayhall,C. William McCurdy,Jeffrey B. Neaton,Christian Ochsenfeld,John Parkhill,Roberto Peverati,Vitaly A. Rassolov,Yihan Shao,Lyudmila V. Slipchenko,Tim Stauch,Tim Stauch,Ryan P. Steele,Joseph E. Subotnik,Alex J. W. Thom,Alexandre Tkatchenko,Donald G. Truhlar,Troy Van Voorhis,Tomasz Adam Wesolowski,K. Birgitta Whaley,H. Lee Woodcock,Paul M. Zimmerman,Shirin Faraji,Peter Gill,Peter Gill,Martin Head-Gordon,John M. Herbert,Anna I. Krylov +238 more
TL;DR: The Q-Chem quantum chemistry program package as discussed by the authors provides a suite of tools for modeling core-level spectroscopy, methods for describing metastable resonances, and methods for computing vibronic spectra, the nuclear-electronic orbital method, and several different energy decomposition analysis techniques.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Application of the pople-santry-segal CNDO method to the cyclopropylcarbinyl and cyclobutyl cation and to bicyclobutane
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