Premium
The Na⋅⋅⋅B Bond in NaBH 3 − : A Different Type of Bond
Author(s) -
ForoutanNejad Cina
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202010024
Subject(s) - covalent bond , ionic bonding , chemical bond , hydrogen bond , boron , molecule , pi bond , crystallography , atoms in molecules , chemistry , context (archaeology) , sextuple bond , chemical physics , electron deficiency , computational chemistry , bond order , bond length , ion , organic chemistry , paleontology , biology
A newly introduced Na−B bond in NaBH 3 − has been a challenge for the chemical bonding community. Here, a series of MBH 3 − (M=Li, Na, K) species and NaB(CN) 3 − are studied within the context of quantum chemical topology approaches. The analyses suggest that M–B interaction cannot be classified as an ordinary covalent, dative, or even simple ionic interaction. The interactions are controlled by coulombic forces between the metals and the substituents on boron, for example, H or CN, more than the direct M–B interaction. On the other hand, while the characteristics of the (3, −1) critical points of the bonds are comparable to weak hydrogen bonds, not covalent bonds, the metal and boron share a substantial sum of electrons. To the best of the author's knowledge, the characteristics of these bonds are unprecedented among known molecules. Considering all paradoxical properties of these bonds, they are herein described as ionic‐enforced covalent bonds.