In the title hydrated mol-ecular salt, C(4)H(14)N(2)O(2+)·C(2)O(4) (2-)·H(2)O, the oxalate dianion is almost planar (r.m.s. deviation = 0.020 Å). In the crystal, the components are linked by N-H⋯O(water), N-H⋯O(oxalate) O-H(ammonium)⋯O(oxalate), O-H(water)⋯O(oxalate) and O-H(water)⋯O(ammonium) hydrogen bonds, thereby forming a complex three-dimensional packing motif.

A number of approaches have been used to control the shape of metal oxalates, which often used as precursors for metal oxide nanomaterials. However, attempts to use water as a regulator have not been reported. Here in we report systematic studies on related topics: nanosheets, composed of 1-dimensional [M(C2O4)(EG)] (M = Zn or Co) polymeric structure, could be transformed into nanorods by using...

This study investigates the in vitro formation of Ca-oxalates and glushinskite through fungal interaction with carbonate substrates and seawater as a process of biologically induced metal recycling and neo-mineral formation. The study also emphasizes the role of the substrates as metal donors. In the first experiment, thin sections prepared from dolomitic rock samples of Terwagne Formation (Car...

The formation of N-methylpyridinium salts in the solvothermal synthesis of molybdenum(V) complexes with oxalate in methanol in the presence of pyridine was investigated. It was found that dimethyl oxalate is formed first, which can thereupon alkylate pyridine. Pyridine reacts with a variety of esters, forming N-alkylpyridinium salts. Most reactive in this respect are sulfonates, whereas among c...