Formation constants of the chelates of Ni(II) and Tl(I) with glycollic acid and thioglycollic acid have been determined by Irving‐Rossotti technique. The relative stabilities have been interpreted in terms of the possibility of π interaction in the formation of NiS bond.
A simple one-step synthesis was accomplished for the preparation of N-phosphoramidophosphonates by a direct reaction of phosphoramidate (1) with heterocyclic aldehydes (2a-j) and dialkyl phosphites at 60-70 degrees C in the presence of tetramethylguanidine. The tetramethylguanidine not only catalyses this reaction but also helps to form pure products in high yields in lesser time. They exhibited good insecticidal and antioxidant properties.
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