Cu(II) and Mn(II) coordination complexes constructed by C linked bispyrazoles: Effect of anions and hydrogen bonding on the self assembly process

[Display omitted] •Synthesis of new bis-pyrazole ligand and their three coordination complexes.•IR spectroscopy of the synthesized complexes.•X-ray Single crystal structure description of these complexes.•Study the effect of anion induced hydrogen bonding on the supramolecular structures of these complexes. The reaction of 1,5,5′-trimethyl-1H,1′H-3,3′-bipyrazole (Hbpz) with copper and manganese salts (Cu(BF4)2·6H2O, MnCl2·4H2O and Mn(NCS)2) leads to the formation of three mononuclear coordination complexes [Cu(Hbpz)3](BF4)2(1), [Mn(Hbpz)2Cl2]·CH3CN (2) and [Mn(Hbpz)2(NCS)2]·Et2O (3). These compounds have been characterized using single crystal X-ray diffraction and infrared spectroscopy. The single crystal structures of 1, 2 and 3 are discussed in the context of the effect of hydrogen bonding functionalities and counter anions on the supramolecular structural diversities observed in these new coordination complexes.