A new cyanoscorpionate ligand, hydrotris(3- t-butyl-4-cyanopyrazolyl)borate (Tp ( t-Bu,4CN )) is reported. Both Tp ( t-Bu,4CN ) and hydrotris(4-cyano-3-phenylpyrazolyl)borate (Tp (Ph,4CN)) form one-dimensional coordination polymers with Cu(I). The polymeric chains align to form channels which, in the case of Tp ( t-Bu,4CN ), can encapsulate solvent molecules, as evidenced by the characterization of one such polymer with encapsulated acetonitrile molecules.

The title compound, C6H8FN3O2, an analog of histidine, shows a reduced side-chain pKa (ca 1). The title structure exhibits a shortening of the bond between the proximal ring N atom and the F-substituted ring C atom, indicating an increase in π-bond character due to an inductive effect of fluorine.

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magnified imageThe treatment of a 1,2,5‐thiadiazolidine 1,1‐dioxide‐derived phenylthiomethyl ether with sulfuryl chloride yielded an unexpected dimeric product whose structure was determined using X‐ray crystallography. A plausible mechanism for the formation of this product is proposed. J. Heterocyclic Chem. (2009).