Synthesis and crystal structure of a novel cobalt(II) coordination polymer with molecular ladder structure

Co(NO3)(2), N-carbazolyacetic acid and 4, 4'-bipyridyl can give rise to a novel coordination polymer [CO2(Cabo)(2)(NO3)(2)(4, 4'-bipy)(2)](n) using a fritted U-tube. Single crystal X-ray diffraction displays in the complex, each Co(II) is six-coordinated by two N atoms from different 4, 4'-bipyridyl ligands, two O atoms of the bridge from two N-carbazolyacetic acid and two O atoms of one nitrate anion to form a distorted octahedral. Two O atoms of the carboxyl group act as bridge to link two Co W atoms. The resulting structure is a ladder polymer.