Hogue, Floyd; Frye, Herschel published an article about the compound: 1-Piperidineacetic Acid( cas:3235-67-4,SMILESS:OC(=O)CN1CCCCC1 ).Reference of 1-Piperidineacetic Acid. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3235-67-4) through the article.
Pd2+ and Pt2+ complexes with 1-pyrrolidineacetic (PyrAA), 1-piperidineacetic (PipAA), and hexahydro-1-azepineacetic (HexAA) acids were prepared and tentative structures assigned. Ligand ionization constants (pKa) are: PipAA 2.18, 10.19; PyrAA 2.41, 10.49; HexAA 2.20, 10.61 at 25 ± 0.1.degree.. Complex stability constants (Ktotal) are: Pd(PipAA)2 5.2 × 1019; Pt(PipAA)2 2.7 × 1017; Pd(PyrAA)2 1.7 × 1021; Pt(PyrAA)2 7.5 × 1019; Pd(HexAA)2 2.8 × 1020; Pt(HexAA)2 5.7 × 1018. The PipAA and PyrAA complexes are apparently cis while theHexAA complexes are trans since the former crystallize as needles and the latter as plates and the metal-N ir stretch occurs at 550 cm-1 for the HexAA complexes and at 525 cm-1 for PipAA complexes.
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