Supramolecular Aggregation of Lead(Ii) Perchlorate and a Thiosemicarbazide Derivative Linked by a Myriad of Non-Covalent Interactions

The tetrel bonding role in supramolecular aggregation of lead(II) acetate and a thiosemicarbazide derivative

“…With all this in mind and in continuation of our ongoing interest in the coordination chemistry of the hemidirected Pb II as well in study the role of non-covalent interactions in the formation of extended structures (Mahmoudi et al, 2016(Mahmoudi et al, , 2017a(Mahmoudi et al, ,b,c, 2018(Mahmoudi et al, , 2020a(Mahmoudi et al, ,b,c,d, 2021Akbari Afkhami et al, 2020a,b;Vela ´squez et al, 2020;Garcı ´a-Santos et al, 2022), we have directed our attention to the 1-(pyridin-2-yl)benzylidene-4-phenylthiosemicarbazide (HL), which is a pincer-type ligand. HL belongs to a family of thiosemicarbazide derivatives, 1-(pyridin-2/3/4-yl)methylidene-4-phenylthiosemicarbazide (HA), 1-(1-pyridin-2/3/4-yl)ethylidene-4phenylthiosemicarbazide (HB) and 1-(pyridin-2/3/4-yl)benzylidene-4-phenylthiosemicarbazide (HC) (Fig.…”

“…This is mainly due to its large ionic radius with a rich variety of coordination numbers from 2 up to 10 and to the presence of the 6s 2 lone pair, which can be stereochemically active (hemidirectional) or non-active (holodirectional) (Shimoni-Livny et al, 1998;Bauza ´et al, 2016Bauza ´et al, , 2019Alkorta et al, 2020). As result of the hemidirected coordination, the Pb II can be involved in tetrel bonding, yielding supramolecular architectures with extended topologies and interesting properties (Mahmoudi et al, 2016(Mahmoudi et al, , 2017a(Mahmoudi et al, ,c, 2018(Mahmoudi et al, , 2020a(Mahmoudi et al, ,b, 2021Akbari Afkhami et al, 2020a,b;Garcı ´a-Santos et al, 2022).…”