Open Square‐Grid Coordination Polymers of the Dimensions 20×20 Å: Remarkably Stable and Crystalline Solids Even after Guest Removal

Uniform channels of dimensions of about 20×10 Å which are occupied by one-dimensional columns of guest molecules are contained in the big square grid (20×20 Å) coordination polymer [{[Ni(1)2(NO3)2]⋅5(C6H6)⋅2(CH3OH)}n] (1=2-(4-pyridyl)-4,4,5,5-tetramethyl-1,3-dioxaboralone, see picture). The network maintained its structural integrity up to 300°C and was characterized by single-crystal X-ray diffraction before and after the guest removal.