**Metallosupramolecular Compounds Based on Copper(II**/**I) Chloride and Two Bis-Tetrazole Organosulfur Ligands**

### **Olaya Gómez-Paz 1, Rosa Carballo 1,\*, Ana Belén Lago 2,\* and Ezequiel M. <sup>V</sup>ázquez-López 1**


Received: 13 January 2020; Accepted: 29 January 2020; Published: 4 February 2020

**Abstract:** The present work assesses the ability of two flexible bis-tetrazole organosulfur ligands to build up different metallosupramolecular compounds based on the analysis of the different supramolecular interactions. The reaction of copper(II) chloride dihydrate with the *N*,*N*'-donor dithioether ligands bis(1-methyl-1*H*-tetrazole-5-ylthio)methane (BMTTM) and 1,2-bis(1-methyl-1*H*-tetrazole-5-ylthio)ethane (BMTTE) was investigated using different synthetic methods. Four compounds have been obtained as single crystals: two pseudopolymorphic 1D Cu(II) coordination polymers with the ligand BMTTM, a 2D Cu(II) coordination polymer and a discrete Cu(I) tetramer with the BMTTE ligand. The effects of the weak interactions on the crystal packing and the Hirshfeld surfaces of the structures were analyzed to clarify the nature of the intermolecular interactions.

**Keywords:** copper chloride complexes; H-bonding pattern; tetrazole ligands; X-ray diffraction; Hirshfeld surfaces
