20.500.12556/RUL-145901 Amidine compounds as products of a piperidine reaction with acetonitrile in the presence of zinc(II) precursors The influence of the zinc(II) starting material in the nucleophilic addition of piperidine (abbreviated as pipe) to acetonitrile to form amidine, piperidinoacetamidine (pipeam), was assessed. Thus, zinc(II) oxide, zinc(II) chloride or zinc(II) acetate were reacted with picolinic acid or pyrazinoic acid, piperidine and acetonitrile. The acid was used as a source of an N,O-donor ligand. The reactions with picolinic acid (picH) gave pipeamH[Zn(pic)$_3$]·0.5H$_2$O (1), an amidinium salt of a homoleptic complex [Zn(pic)$_3$]$^–$. The same product was obtained when [Zn(pic)(picH)Cl], an already known picolinate complex, was reacted under similar conditions. The chloride-containing mixtures produced another amidine compound, (pipeamH)Cl. The reactions with pyrazinoic acid (pyrazH) gave pipeamH[Zn(pyraz)$_3$] (3), the amidinium salt of a homoleptic complex [Zn(pyraz)$_3$]$^–$. The acetate-containing mixture yielded acetamidinium acetate. The latter product indicates the presence of ammonia in the reaction. Notably, no amidine species was isolated when the coordinatively saturated pyrazinoate complex, [Zn(pyraz)$_2$]$_n$ (2), was reacted with piperidine and acetonitrile. A detailed structural characterization of the new compounds and a discussion of their formation are presented. coordination compounds zinc(II) picolinic acid pyrazinoic acid amidine crystal structure koordinacijske spojine cink(II) pikolinska kislina pirazinojska kislina amidin kristalna struktura true false true Angleški jezik Slovenski jezik Članek v reviji 2023-05-17 13:58:13 2023-05-17 13:58:13 2023-09-01 04:00:53 0000-00-00 00:00:00 2023 0 0 8 str. Vol. 1284, art. 135457 15 Jul. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 546.47:547.82 0022-2860 10.1016/j.molstruc.2023.135457 147747843 1-s2.0-S0022286023005549-main.pdf 1-s2.0-S0022286023005549-main.pdf 1 A720A76D4628AC183132E9BFA8769AD6 e6b557601e1f441582f7668cf3e8861d4b390619ccebf725f6afc66deec8e483 6965c10b-f4aa-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168985 https://www.sciencedirect.com/science/article/pii/S0022286023005549 1 d7bc5088-f4a9-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168983 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0