An unusual (4,6)-connected three dimensional framework and a two-dimensional (6,3) network based on flexible and rigid co-ligands

► Flexible 1,4-bis(1,2,4-triazol-1-yl)butane and rigid 1,4-benzenedicarboxylate co-ligands construct MOFs. ► (4,6)-Connected 3D network. ► 2D (6,3) network. ► 4-Connected Mn and 6-connected Mn in one network. ► Three conformation btb ligands in one complex.