ABSTRACT
The title compound, [Cu(NO3)(C12H8N2)2]NO3·C7H6O5·H2O, consists of a mononuclear complex cation with the central CuII atom in a distorted trigonal-bipyramidal coordination sphere. Two N atoms of two 1,10-phenanthroline ligands occupy the axial sites, and the remaining N atoms of the two ligands, as well as one nitrate O atom the equatorial positions. One mol-ecule each of gallic acid and water are present in the crystal as solvent mol-ecules that do not coordinate to the CuII cation, just as the nitrate counter-anion. In the crystal, inter-molecular O-Hâ¯O hydrogen bonds, as well as C-Hâ¯O inter-actions and π-π ring stacking between benzene and pyridine rings [centroid-to-centroid distances = 3.471â (2), 3.559â (2) and 3.790â (2)â Å], link the mol-ecules into a three-dimensional network structure.
ABSTRACT
In the polymeric title compound, {[Ce(2)(C(7)H(3)NO(4))(2)(C(2)O(4))(H(2)O)(6)]·H(2)O}(n), the Ce(3+) cation is nine-coordinated in a distorted CeNO(8) tricapped trigonal-prismatic geometry, formed by three pyridine-2,4-dicarboxyl-ate anions, one oxalate anion and three water mol-ecules. The mid-point of the oxalate anion is located on an inversion center. The oxalate and pyridine-2,4-dicarboxyl-ate anions bridge the Ce(3+) cations, forming a two-dimensional polymeric complex parallel to (010). Inter-molecular classical O-Hâ¯O hydrogen bonding and weak C-Hâ¯O hydrogen bonding are present in the crystal structure and π-π stacking [centroid-centroid distance = 3.558â (2)â Å] is observed between parallel pyridine rings of adjacent mol-ecules. The uncoordinated water mol-ecule shows an occupancy of 0.5.
ABSTRACT
In the polymeric title compound, {[La(2)(C(7)H(3)NO(4))(2)(C(2)O(4))(H(2)O)(6)]·H(2)O}(n), the La(3+) cation is nine-coordinated in a distorted LaNO(8) tricapped trigonal-prismatic geometry formed by three pyridinedicarboxylate anions, one oxalate anion and three water mol-ecules. The oxalate anion is located on an inversion center. The oxalate and pyridine-dicarboxyl-ate anions bridge the La(3+) cations, forming a two-dimensional polymeric complex parallel to (010). Inter-molecular O-Hâ¯O hydrogen bonding and weak C-Hâ¯O hydrogen bonding is present in the crystal structure and π-π stacking [centroid-centroid distance = 3.571â (3)â Å] is observed between parallel pyridine rings of adjacent mol-ecules. The uncoordinated water molecule shows an occupancy of 0.5.
ABSTRACT
The asymmetric unit of the title coordination polymer, {[La(2)(C(8)H(4)O(4))(3)(H(2)O)]·0.5H(2)O}(n), contains two independent La(III) atoms, one of which is surrounded by eight carboxyl-ate-O atoms from six benzene-1,2-dicarboxyl-ate (BDC) anions in a bicapped trigonal-prismatic geometry. The other La(III) atom is nine-coordinated in a tricapped trigonal-prismatic geometry, formed by eight carboxyl-ate-O atoms from six BDC anions and a coordinated water mol-ecule. The BDC anions bridge the La(III) atoms, forming a two-dimensional polymeric complex parallel to (001). The crystal structure contains weak O-Hâ¯O and non-classical C-Hâ¯O hydrogen bonds. A C-Hâ¯π inter-action is also present in the crystal structure. The uncoordinated water molecule shows half-occupation.
ABSTRACT
There are two independent La(III) cations in the polymeric title compound, {[La(2)(C(7)H(3)NO(4))(3)(H(2)O)(4)]·2H(2)O}(n). One is nine-coordinated in an LaN(2)O(7) tricapped trigonal-prismatic geometry formed by three pyridine-2,6-dicarboxyl-ate anions and two water mol-ecules, while the other is ten-coordinated in an LaNO(9) bicapped square-anti-prismatic geometry formed by four pyridine-2,6-dicarboxyl-ate anions and two water mol-ecules. The two La(III) cations are separated by a non-bonding distance of 5.026â (3)â Å. The pyridine-2,6-dicarboxyl-ate anions bridge the La(III) cations, forming a three-dimensional polymeric complex. The crystal structure contains extensive classical O-Hâ¯O hydrogen bonds and weak inter-molecular C-Hâ¯O hydrogen bonds. The crystal structure is further consolidated by π-π stacking between pyridine rings, the shortest centroid-centroid distance between parallel pyridine rings being 3.700â (5)â Å.
ABSTRACT
The asymmetric unit of the title heterometallic coordination polymer, {[Cu(3)Yb(2)(C(7)H(3)NO(4))(6)(H(2)O)(12)]·2H(2)O}(n), contains one Yb(III) and two Cu(II) atoms. The Cu(II) atom that is located on an inversion center is N,O-chelated by two pyridine-2,5-dicarboxyl-ate (pdc) anions in a square-planar geometry; the Cu atom located on a general position is N,O-chelated by two pdc anions in the basal plane and is further coordinated by a water O atom at the apical position in a distorted square-pyramidal geometry. The Yb(III) atom is eight coordinated in a distorted square-anti-prismatic geometry formed by three carboxyl-ate O atoms from three pdc anions and five water mol-ecules. The pdc anions bridge adjacent Yb(III) and Cu(III) atoms, forming a three-dimensional polymeric structure. The crystal structure contains extensive O-Hâ¯O hydrogen bonds. π-π stacking is present in the crystal structure, the shortest centroid-centroid distance between parallel pyridine rings of adjacent mol-ecules being 3.646â (3)â Å.
ABSTRACT
The asymmetric unit of the title heterometallic polymeric coordination compound, {[CuYb(2)(C(7)H(3)NO(4))(4)(H(2)O)(8)]·H(2)O}(n), contains one Cu(II) cation located on an inversion center, a Yb(III) cation, two pyridine-2,5-dicarboxyl-ate (pda) anions, four coordination water mol-ecules a disordered lattice water molecule, which is half-occupied and is located close to an inversion center. The Cu(II) cation is N,O-chelated by two pda anions in the coordination basal plane and further coordinated by two carboxyl O atoms at the apical positions, with an elongated octa-hedral geometry. The Yb(III) atom is eight-coordinated in a distorted square-anti-prismatic geometry formed by two carboxyl-ate O atoms from two pda anions, and is N,O-chelated by one pda anion and four coordinated water mol-ecules. The pda anions bridge adjacent Yb and Cu cations, forming a three-dimensional polymeric structure. The crystal structure features extensive O-Hâ¯O hydrogen bonds. π-π stacking is observed between parallel pyridine rings, the centroid-centroid distance being 3.843â (4)â Å.
ABSTRACT
In the crystal structure of the title 1:1 adduct, C(12)H(12)N(2)·C(8)H(9)NO(2), the 4-amino-3-methyl-benzoic acid mol-ecules and 1,2-bis-(4-pyrid-yl)ethane mol-ecules are linked by inter-molecular O-Hâ¯N, N-Hâ¯O and N-Hâ¯N hydrogen bonds, forming a two-dimensional supra-molecular network parallel to (001). In the 1,2-bis-(4-pyrid-yl)ethane mol-ecule, the two pyridine rings are twisted to each other by a dihedral angle of 12.12â (8)°. The non-H atoms of the 4-amino-3-methyl-benzoic acid mol-ecule are almost coplanar, the maximum atomic deviation being 0.029â (1)â Å. Weak C-Hâ¯π inter-actions are present in the crystal structure.
ABSTRACT
The asymmetric unit of the title compound, [Ce(2)(C(7)H(3)NO(4))(3)(H(2)O)(3)](n), contains two Ce(III) cations, three pyridine-3,5-dicarboxyl-ate (pyd) anions and three coordinated water mol-ecules. One Ce(III) cation is coordinated by seven carboxyl-ate O atoms from six pyd anions and two water mol-ecules in a square-face-capped square-anti-prismatic geometry. Another Ce(III) cation is coordinated by seven O atoms from six pdy anions and one water mol-ecule in a bicapped trigonal-prismatic geometry. The pdy anions bridge the Ce(III) cations, forming the three-dimensional polymeric structure. The crystal structure contains extensive O-Hâ¯O, O-Hâ¯N and weak C-Hâ¯O hydrogen bonds. π-π stacking is present in the crystal structure, the shortest centroid-centroid distance between parallel pyridine rings being 3.509â (4)â Å.
ABSTRACT
In the title coordination polymer, [Pb(C(7)H(3)NO(4))](n), the Pb(II) ion is eight-coordinated in a distorted square-anti-prismatic geometry formed by one pyridine N atom and seven carboxyl-ate O atoms from four pyridine-2,3-dicarboxyl-ate (pda) anions. In the pda anion, the dihedral angles between the pyridine ring and carboxyl-ate groups are 19.5â (6) and 73.3â (6)°. The carboxyl-ate groups of the pda anions bridge the Pb ions, forming a two-dimensional coordination polymer parallel to (100). Weak inter-molecular C-Hâ¯O hydrogen boning is present in the crystal structure.
ABSTRACT
The asymmetric unit of the title compound, C(12)H(12)N(2)·C(7)H(7)NO(2), contains two 3-amino-benzoic acid mol-ecules and two 1,2-bis-(4-pyrid-yl)ethane mol-ecules. In the two 1,2-bis-(4-pyrid-yl)ethane mol-ecules, the dihedral angles between the pyridyl rings are 2.99â (9) and 46.78â (8)°. In the crystal, the mol-ecules associate through amine and carboxyl group N-Hâ¯O=C inter-actions between one of the 3-amino-benzoic acid mol-ecules and one of the 1,2-bis-(4-pyrid-yl)ethane mol-ecules, generating R(2) (2)(14) dimers, which are extended head-to-tail via amine and pyridine N-Hâ¯N hydrogen bonds. Inter-molecular O-Hâ¯N, N-Hâ¯O, N-Hâ¯N and C-Hâ¯O hydrogen bonding are observed in the crystal structure. C-Hâ¯π and π-π stacking inter-actions [centroid-centroid distance = 3.9985â (10)â Å] are also present.
ABSTRACT
In the title dinuclear In(III) compound, [In(2)(SO(4))(3)(C(12)H(8)N(2))(2)(H(2)O)(2)]·2H(2)O, each In(III) cation is coordinated by a 1,10-phenanthroline (phen) ligand, a water mol-ecule and three sulfate O atoms in a distorted InN(2)O(4) octa-hedral geometry. Three sulfate anions bridge two In(III) cations, forming the dinuclear entities. O-Hâ¯O and weak C-Hâ¯O hydrogen bonding is observed in the crystal structure. The crystal structure is further consolidated by π-π stacking between nearly parallel phen ring systems [dihedral angle = 4.2â (4)°], the centroid-centroid distance between benzene rings of adjacent phen ligands being 3.528â (9)â Å.
ABSTRACT
In the title complex, [Pb(NO(3))(2)(C(14)H(12)N(2))(2)], the lead ion is chelated by two 2,9-dimethyl-1,10-phenanthroline (dmphen) ligands and two nitrate anions in a slightly distorted square-anti-prismatic geometry. Intra- and inter-molecular π-π stacking is present in the crystal structure, and the centroid-centroid distances between the benzene and pyridine rings of adjacent dmphen ligands are 3.492â (3) and 3.592â (3)â Å, respectively. Inter-molecular C-Hâ¯O hydrogen bonds and C-Hâ¯π inter-actions help to stabilize the crystal structure.
ABSTRACT
In the title compound, C(12)H(12)N(2)·2C(7)H(7)NO(2), the 4-amino-benzoic acid mol-ecules are linked by O-Hâ¯N hydrogen bonds to 1,2-bis-(4-pyrid-yl)ethane, forming linear hydrogen bonded chains parallel to [21]. The structure exhibits a hydrogen-bonding network involving COOHâ¯N(pyrid-yl) and amine and carb-oxy-lic N-H⯠O inter-actions. In addition, π-π stacking inter-actions [centroid-centroid distance = 3.8622â (14)â Å] are also present.
ABSTRACT
The asymmetric unit of the title compound, C(12)H(14)N(2) (2+)·2C(7)H(5)O(5) (-)·1.5H(2)O, contains two 4,4'-ethyl-enedipyridinium cations, four gallate anions and three water mol-ecules. In the 4,4'-ethyl-enedipyridinium cations, the dihedral angles between the pyridinium rings are 4.3â (3) and 18.6â (3)°. Extensive classical N-Hâ¯O and O-Hâ¯O hydrogen bonding and weak C-Hâ¯O hydrogen bonding and C-Hâ¯π inter-actions are present in the crystal structure. π-π stacking is also observed, the centroid-centroid separations between the benzene and pyridine rings being 3.611â (3), 3.448â (3) and 3.536â (3)â Å.
ABSTRACT
In the title compound, [Co(C(8)H(5)NO(4))(C(12)H(12)N(2))](n), the Co(II) ion presents a distorted CoO(4)N(2) octa-hedral coordination geometry, formed by three 5-amino-isophthalate dianions and two 1,2-bis-(4-pyrid-yl)ethane ligands. One carboxyl-ate group of the 5-amino-isophthalate dianion chelates a Co cation and the other carboxyl-ate group bridges the other two Co cations, while the terminal N atoms of the 1,2-bis-(4-pyrid-yl)ethane ligand coordinate the neighboring Co cations, forming a two-dimensional polymeric architecture. Two pyridine rings of the 1,2-bis-(4-pyrid-yl)ethane ligand are twisted to each other with a dihedral angle of 50.94â (16)°. Weak C-Hâ¯O hydrogen bonding and N-Hâ¯π inter-actions are observed in the crystal structure. A void of 69â (5)â Å(3) is present in the crystal structure, but no solvent mol-ecule can be located reasonably.
ABSTRACT
In the title polymeric Cu(I) compound, [Cu(2)Br(2)(C(12)H(10)N(2))](n), the Cu cation is coordinated by an N atom from the 1,2-bis-(4-pyrid-yl)ethene ligand and three Br(-) anions in a distorted tetra-hedral CuBr(3)N coordination geometry. Each Br(-) anion bridges three Cu cations related by inversion centers, forming a stair-like polymeric chain along the a axis, and the terminal N atoms of the 1,2-bis-(4-pyrid-yl)ethene ligand, located across an inversion center, coordinate the Cu cations from neighboring chains, forming polymeric sheets.
ABSTRACT
In the title compound, C(12)H(9)N(2) (+)·NO(3) (-)·[Er(C(7)H(5)O(3))(2)(NO(3))(C(12)H(8)N(2))(H(2)O)]·0.5C(12)H(8)N(2)·2H(2)O, the water-mol-ecule-coordinated Er(III) ion is chelated by one 1,10-phenanthroline (phen) ligand, two 4-hy-droxy-benzoate anions and one nitrate anion in a monocapped square-anti-prismatic coordination geometry. The uncoordinating phen mol-ecule is approximately parallel to the 1,10-phenanthrolin-1-ium (Hphen) anion [dihedral angle = 3.3â (4)°]. The centroid-centroid distance of 3.801â (5)â Å between pyridine rings suggests the existence of π-π stacking. The crystal structure contains an extensive network of classical O-Hâ¯O and N-Hâ¯O and weak C-Hâ¯O hydrogen bonds. C-Hâ¯π inter-actions between phen and 4-hy-droxy-benzoate is also present in the crystal structure. In the crystal, the uncoordinating phen is equally disordered over two sites about an inversion center.
ABSTRACT
The Pb(II )atom in the title compound, {[Pb(2)(C(7)H(6)NO(2))(4)]}(n), is chelated by two 3-aminobenzoato ligands in a distorted pentagonal-bipyramidal coordination geometry with five oxygen donors in the equatorial positions, one nitro-gen donor and one oxygen donor in the axial positions. Two mol-ecules are linked through a centre of inversion, forming a dinuclear entity. These entities are linked in a µ(3)-bridging mode through the amino N atom and two carboxyl-ate O atoms into a chain along the b axis. Classical inter-molecular N-Hâ¯O hydrogen bonding is observed in the structure. The supra-molecular structure is consolidated by π-π stacking inter-actions with centroid-centroid distances between benzene rings of 3.837â (8)â Å.
ABSTRACT
In the crystal structure of the title compound, C(12)H(14)N(2) (2+)·2C(7)H(5)O(3) (-), the cations and anions are linked via N-Hâ¯O hydrogen bonds and weak inter-molecular C-Hâ¯O inter-actions also occur. π-π stacking is observed between the nearly parallel benzene and pyridine rings [dihedral angle = 6.03â (8)°], the centroid-centroid separation being 3.7546â (16)â Å. The 4,4'-(ethane-1,2-diyl)dipyridinium cation is centrosymmetric and the mid-point of the ethyl-ene C-C bond is located on an inversion center. An intra-molecular O-Hâ¯O hydrogen bond occurs in the anion.