"9"^^ . "Gyepes, Robert" . "10.1016/j.molstruc.2013.02.022" . . . "1"^^ . "000319176700017" . . . "4"^^ . . "Anion\u2013\u03C0, lone pair\u2013\u03C0 and \u03C0\u2013\u03C0 interactions in VO(O2)+ complexes with one dipicolinato(2-)-N,O,O ligand and bearing picolinamidium, nicotinamidium or phenanthrolinium as counterions" . . . . "Siv\u00E1k, M." . "From the V2O5single bondH2O2single bondH2dipic\u2013nica/pa/phen\u2013H2O/H2Osingle bondCH3CN reaction systems (H2dipic = dipicolinic acid, nica = nicotinamide, pa = picolinamide, phen = 1,10-phenanthroline), three monoperoxidovanadium(V) complexes have been synthesized and structurally characterized: (Hpa)[VO(O2)(dipic)(H2O)].H2O (1), (Hnica)[VO(O2)(dipic)(H2O)] (2) and (Hphen)[VO(O2)(dipic)(H2O)].H2O (3). The organic counterions in 1\u20133 are protonated on the aromatic nitrogen atoms, whereas the dipicolinato(2-) (=dipic) ligand adopts a tridentate chelating coordination mode in all three complexes. The NOO donor atoms of dipic occupy the three equatorial positions of the characteristic distorted pentagonal bipyramid around the central vanadium atom. The aqua ligand is located in the apical position trans to the short Vtriple bond; length of mdashO(oxido) bond. In addition to electrostatic cation\u2013anion interactions, the supramolecular architecture of the title complexes is formed by: (i) a network of Dsingle bondH...O (D = N, O and C) hydrogen bonds, (ii) \u03C0\u2013\u03C0 interactions between offset pyridine rings of dipic (in 1 and 2) as well as between the rings of Hpa+, Hnica+ or Hphen+, (iii) anion\u2013\u03C0 interactions (in 1 and 3) between the oxygen atoms of the COO group and rings of the dipic ligands, and (iv) the rarely recognized lone pair\u2013\u03C0 interaction between the carboxamide oxygen atoms of Hpa+ and pyridine rings in 1, as well as between the oxygen atoms from crystal water molecules and the pyridine rings of Hphen+ in 3. The anion\u2013\u03C0 and lone pair\u2013\u03C0 interactions were studied more in detail by DFT. A common feature for both these interactions was the lack of significant covalent contributions to the attraction between the respective partners."@en . . "RIV/61388955:_____/13:00391992!RIV14-AV0-61388955" . "RIV/61388955:_____/13:00391992" . "Anion\u2013\u03C0, lone pair\u2013\u03C0 and \u03C0\u2013\u03C0 interactions in VO(O2)+ complexes with one dipicolinato(2-)-N,O,O ligand and bearing picolinamidium, nicotinamidium or phenanthrolinium as counterions"@en . . . "Pacigov\u00E1, S." . "JUN 2013" . . "61273" . "0022-2860" . . "Anion\u2013\u03C0, lone pair\u2013\u03C0 and \u03C0\u2013\u03C0 interactions in VO(O2)+ complexes with one dipicolinato(2-)-N,O,O ligand and bearing picolinamidium, nicotinamidium or phenanthrolinium as counterions" . "1041" . "Anion\u2013\u03C0, lone pair\u2013\u03C0 and \u03C0\u2013\u03C0 interactions in VO(O2)+ complexes with one dipicolinato(2-)-N,O,O ligand and bearing picolinamidium, nicotinamidium or phenanthrolinium as counterions"@en . "[84552B70EABF]" . "Tatiersky, J." . . . . "I, P(KAN100400701)" . . "From the V2O5single bondH2O2single bondH2dipic\u2013nica/pa/phen\u2013H2O/H2Osingle bondCH3CN reaction systems (H2dipic = dipicolinic acid, nica = nicotinamide, pa = picolinamide, phen = 1,10-phenanthroline), three monoperoxidovanadium(V) complexes have been synthesized and structurally characterized: (Hpa)[VO(O2)(dipic)(H2O)].H2O (1), (Hnica)[VO(O2)(dipic)(H2O)] (2) and (Hphen)[VO(O2)(dipic)(H2O)].H2O (3). The organic counterions in 1\u20133 are protonated on the aromatic nitrogen atoms, whereas the dipicolinato(2-) (=dipic) ligand adopts a tridentate chelating coordination mode in all three complexes. The NOO donor atoms of dipic occupy the three equatorial positions of the characteristic distorted pentagonal bipyramid around the central vanadium atom. The aqua ligand is located in the apical position trans to the short Vtriple bond; length of mdashO(oxido) bond. In addition to electrostatic cation\u2013anion interactions, the supramolecular architecture of the title complexes is formed by: (i) a network of Dsingle bondH...O (D = N, O and C) hydrogen bonds, (ii) \u03C0\u2013\u03C0 interactions between offset pyridine rings of dipic (in 1 and 2) as well as between the rings of Hpa+, Hnica+ or Hphen+, (iii) anion\u2013\u03C0 interactions (in 1 and 3) between the oxygen atoms of the COO group and rings of the dipic ligands, and (iv) the rarely recognized lone pair\u2013\u03C0 interaction between the carboxamide oxygen atoms of Hpa+ and pyridine rings in 1, as well as between the oxygen atoms from crystal water molecules and the pyridine rings of Hphen+ in 3. The anion\u2013\u03C0 and lone pair\u2013\u03C0 interactions were studied more in detail by DFT. A common feature for both these interactions was the lack of significant covalent contributions to the attraction between the respective partners." . "Journal of Molecular Structure" . "Monoperoxidovanadium (V); Dipicolinato(2-) ligand; Anion\u2013\u03C0"@en . "NL - Nizozemsko" .