Synthesis, crystal structure and Hirshfeld surface analysis of sodium bis(malonato)borate monohydrate

Abstract

In the title salt, poly[aqua[�4-bis(malonato)borato]sodium], {[Na(C6H4- BO8)]·H2O}n or Na+·[B(C3H2O4)2]􀀀 ·H2O, the sodium cation exhibits fivefold coordination by four carbonyl O atoms of the bis(malonato)borate anions and a water O atom. The tetrahedral B atom at the centre of the anion leads to the formation of a polymeric three-dimensional framework, which is consolidated by C—H� � �O and O—H� � �O hydrogen bonds. A Hirshfeld surface analysis indicates that the most significant contacts in the crystal packing are H� � �O/ O� � �H (49.7%), Na� � �O/O� � �Na (16.1%), O� � �O (12.6%), H� � �H (10.7%) and C� � �O/O� � �C (7.3%).