The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1H-Pyrazole-5-carbaldehyde, is researched, Molecular C4H4N2O, CAS is 948552-36-1, about A pyrazole-containing verdazyl radical ligand Meprv: structure of its precursor prvH3 and its bis(2,2′-bipyridine)ruthenium(II) complex, the main research direction is pyrazolyloxotetrazane preparation structure dehydrogenation; crystal structure pyrazolyloxotetrazane; ruthenium pyrazolyloxoverdazyl bipyridine complex preparation electrochem redox; verdazyl pyrazolyl ruthenium bipyridine complex preparation.Reference of 1H-Pyrazole-5-carbaldehyde.
Reaction between 1,1′-dimethyl carbonic dihydrazide and pyrazole-3-carboxaldehyde gave 1,5-dimethyl-3-(3′-pyrazolyl)-6-oxotetrazane (prvH3), which crystallizes in the orthorhombic space group Pca21, with a 10.7745(4), b 8.1745(2) and c 10.6625(3) Å. Dehydrogenation of prvH3 in methanol by 1,4-benzoquinone afforded the methylated radical 1,5-dimethyl-3-(1′-methyl-3′-pyrazolyl)-6-oxoverdazyl (Meprv), which reacted with cis-[Ru(bpy)2Cl2] and NaBPh4 to yield [Ru(bpy)2(Meprv)]2+ as its BPh4 salt. The absence of luminescence and the electrochem. behavior of this complex imply that the lowest 3MLCT (metal to ligand charge transfer) excited state is located on the electron-deficient Meprv ligand.
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