Aqua-bis-(2,2'-bi-pyridine-κ2N,N')(isonicotinamide-κN)ruthenium(II) bis-(trifluoromethanesulfonate).

In the title complex, [Ru(C10H8N2)2(C6H6N2O)(H2O)](CF3SO3)2, the central RuII atom is sixfold coordinated by two bidentate 2,2'-bi-pyridine, an isonic-otinamide ligand, and a water mol-ecule in a distorted octa-hedral environment with tri-fluoro-methane-sulfonate ions completing the outer coordination sphere of the complex. Hydrogen bonding involving the water mol-ecule and weak π-π stacking inter-actions between the pyridyl rings in adjacent mol-ecules contribute to the alignment of the complexes in columns parallel to the c axis.

(2,2'-Bi-pyridine-κ2N,N')(4,4'-dimeth-oxy-2,2'-bipyridine-κ2N,N')palladium(II) bis-(tri-fluoro-meth-anesulfonate).

In the title complex salt, [Pd(C10H8N2)(C12H12N2O2)](CF3SO3)2, the palladium(II) atom is fourfold coordinated by two chelating ligands, 2,2'-bi-pyridine and 4,4'-dimeth-oxy-2,2'-bi-pyridine, in a distorted square-planar environment. In the crystal, weak π-π stacking inter-actions between the 2,2'-bi-pyridine rings [centroid-to-centroid distances = 3.8984 (19) Å] and between the 4,4'-dimeth-oxy-2,2'-bi-pyridine rings [centroid-to-centroid distances = 3.747 (18) Å] contribute to the alignment of the complex cations in columns parallel to the b-axis direction.

Di-chlorido-(4,7-dimeth-oxy-1,10-phenanthroline-κ2N,N')zinc(II).

In the title complex, [ZnCl2(C14H12N2O2)], the ZnII atom is located on a twofold rotation axis and is fourfold coordinated by two chlorido ligands and a bidentate 4,7-meth-oxy-1,10-phenanthroline ligand in a distorted tetra-hedral environment. Weak π-π stacking inter-actions between adjacent 4,7-dimeth-oxy-1,10-phenanthroline rings [centroid-to-centroid distances = 3.5969 (11) and 3.7738 (11) Å] contribute to the alignment of the complexes in layers parallel to (01).

Bis[2,6-bis-(benzimidazol-2-yl)pyridine-κ3N,N',N'']nickel(II) bis-(tri-fluoro-methane-sulfonate) diethyl ether monosolvate.

In the title complex, [Ni(C19H13N5)2](CF3SO3)2·(CH3CH2)2O, the central NiII atom is sixfold coordinated by three nitro-gen atoms of each 2,6-bis-(2-benzimidazol-yl)pyridine ligand in a distorted octa-hedral geometry with two tri-fluoro-methane-sulfonate ions and a mol-ecule of diethyl ether completing the outer coordination sphere of the complex. Hydrogen bonding contributes to the organization of the asymmetric units in columns along the a axis generating a porous supra-molecular structure. The structure was refined as a two-component twin with a refined BASF value of 0.4104 (13).

Diaceto-nitrile-(2,2'-bi-pyridine-κ2 N,N')palladium(II) bis-(tri-fluoro-methane-sulfonate).

In the title complex, [Pd(C10H8N2)(CH3CN)2](CF3SO3)2 or [Pd(bipy)(CH3CN)2](CF3SO3)2, the palladium(II) ion is fourfold coordinated by two aceto-nitrile mol-ecules and a bidentate 2,2'-bi-pyridine ligand in a distorted square-planar geometry.

Di-chlorido-(4,4'-dimethyl-2,2'-bi-pyridine-κ2 N,N')zinc(II) aceto-nitrile monosolvate.

In the title complex, [ZnCl2(C12H12N2)]·CH3CN, the zinc(II) atom is fourfold coordinated by two chloride ligands and a bidentate 4,4'-dimethyl-2,2'-bi-pyridine ligand in a distorted tetra-hedral shape with a mol-ecule of aceto-nitrile sitting in the outer coordination sphere of the complex. π-π stacking inter-actions between the pyridyl rings in adjacent mol-ecules contribute to the alignment of the complexes in columns parallel to the a axis.

[1,2-Bis(di-phenyl-phosphan-yl)ethane-κ2 P,P]chlorido-(isonicotinamide-κN)palladium(II) nitrate aceto-nitrile monosolvate.

The PdII central atom in the title complex, [PdCl(C26H24P2)(C6H6N2O)]NO3·CH3CN or [PdCl(dppe)(INAM)]NO3·CH3CN, where dppe is 1,2-bis-(di-phenyl-phosphan-yl)ethane and INAM is isonicotinamide, exists in a slightly distorted square-planar environment defined by the two P atoms of the dppe ligand, a chloride ligand and the N atom of the isonicotinamide pyridyl ring. The crystal packing in the structure is held together by hydrogen bonds between the amide of the INAM ligand and the nitrate ions that complete the outer coordination sphere. A mol-ecule of aceto-nitrile is also found in the asymmetric unit of the title complex.

Bis(isonicotinamide-κN)silver(I) tri-fluoro-methane-sulfonate aceto-nitrile disolvate.

The central AgI atom of the title salt, [Ag(INAM)2](CF3SO3)·2CH3CN, where INAM is isonicotinamide (C6H6N2O), is twofold coordinated by the pyridine N atoms of two isonicotinamide ligands creating a slightly distorted linear mol-ecular geometry. The formation of polymeric chains {[Ag(INAM)2]+} n , held together by discrete hydrogen bonds through the amide group of the INAM ligand leaves voids for non-coordinating aceto-nitrile mol-ecules that inter-act the silver metal center via regium bonds.

Di-µ-chlorido-bis-[(2,2':6',2''-terpyridine-κ3 N,N',N'')copper(II)] bis-(tri-fluoro-methane-sulfonate).

In the centrosymmetric title complex, [Cu2Cl2(C15H11N3)2](CF3O3S)2, the CuII metal center is fivefold coordinated by two chloride ions and three nitro-gen atoms of the terpyridine ligand in a distorted square-pyramidal geometry; two tri-fluoro-methane-sulfonate ions complete the outer coordination sphere. π-π stacking inter-actions between the pyridyl rings in adjacent mol-ecules contribute to the alignment of the complexes in columns along the a-axis. This structure represents the first example of a binuclear dication of formula [Cu(terpy)2Cl2]2+ with tri-fluoro-methane-sulfonate as counter-ions.

Chlorido-(4'-chloro-2,2':6',2''-terpyridine-κ3 N,N',N'')(tri-fluoro-methane-sulfonato-κO)zinc(II) aceto-nitrile monosolvate.

In the title complex, [Zn(CF3O3S)Cl(C15H10ClN3)]·CH3CN, the zinc(II) core is fivefold coordinated by one chloride, one tri-fluoro-methane-sulfonate O atom and three terpyridine N atoms in a slightly distorted square-pyramidal geometry. The structure provides a distinct example amongst other zinc(II) 4-chloro-terpyridine complexes because of the unusual planarity of the coordinated chloride, the short length of the Zn-N bond opposite to the chloride ligand [1.9572 (15) Å], and the presence of an elongated Zn-O bond [2.3911 (14) Å] in the coordinated tri-fluoro-methane-sulfonate ion. A molecule of acetonitrile is also found in the asymmetric unit of the title complex.

catena-Poly[[[bis-(aceto-nitrile-κN)(4,4'-dimeth-oxy-2,2'-bi-pyridine-κ2 N,N')copper(II)]-µ-tri-fluoro-methane-sulfonato-κ2 O:O'] tri-fluoro-methane-sulfonate].

The central copper(II) atom of the title salt, {[Cu(CF3SO3)(CH3CN)2(C12H12N2O2)](CF3SO3)} n or [[Cu(CH3CN)2(diOMe-bpy)(CF3SO3)](CF3SO3)] n where diOMe-bpy is 4,4'-dimeth-oxy-2,2'-bi-pyridine, C12H12N2O2, is sixfold coordin-ated by the N atoms of the chelating bi-pyridine ligand, the N atoms of two aceto-nitrile mol-ecules, and two tri-fluoro-methane-sulfonate O atoms in a tetra-gonally distorted octa-hedral shape. The formation of polymeric chains [Cu(CH3CN)2(diOMe-bpy)(CF3SO3)]+ n leaves voids for the non-coordinating tri-fluoro-methane-sulfonate anions that inter-act with the complex through weak hydrogen bonds. The presence of weakly coordinating ligands like aceto-nitrile and tri-fluoro-methane-sulfonate makes the title compound a convenient starting material for the synthesis of novel metal-organic frameworks.

(4'-Chloro-2,2':6',2''-terpyridine-κ3 N,N',N'')bis(nitrato-κO)zinc(II).

In the title complex, [Zn(C15H10ClN3)(NO3)2], the central zinc(II) atom is penta-coordinated by two O-bonded nitrate ions and three N atoms of the 4'-chloro-2,2':6',2''-terpyridine ligand in a slightly distorted trigonal-bipyramidal shape. The main feature of the title complex packing is the presence of offset π-π inter-actions between the terpyridine rings in different layers. This structure constitutes the first known example of a zinc(II) 4-chloro-terpyridine complex with coordinating nitrate ions.

cis-(2,2'-Bipyridine-κ(2)N,N')bis-(isonicotinamide-κN(1))palladium(II) bis-(hexa-fluoridophosphate).

In the title salt, [Pd(C(10)H(8)N(2))(C(6)H(6)NO)(2)](PF(6))(2), the Pd(II) atom is in a slightly distorted square-planar coordination environment by N atoms derived from two 4-pyridine-carboxamide ligands, in a cis disposition, and a chelating 2,2'-bipyridine mol-ecule. The monodentate ligands are nearly orthogonal to each other [dihedral angle = 85.7 (5)°] and to the PdN(4) plane [dihedral angles = 79.3 (3) and 78.7 (3)°]. The amide O atoms lie to opposite sides of the PdN(4) plane. The most notable feature of the crystal packing is a linear supra-molecular chain orientated approximately along [310] and formed via 16-membered {⋯HNCO}(4) motifs. These are connected into a three-dimensional network by amide-H⋯O, F inter-actions. Both PF(6) (-) anions are disordered over two positions of equal occupancy in respect of the F atoms.

Tetra-kis(4-cyano-pyridine)-palladium(II) bis-(trifluoro-methane-sulfonate).

The title salt, [Pd(C(6)H(4)N(2))(4)](CF(3)SO(3))(2), comprises Pd(4-cyano-pyridine)(4) dications balanced by two trifluoro-methane-sulfonate anions. The Pd(II) atom lies in a square-planar geometry defined by four N atoms which form equivalent Pd-N inter-actions. The 4-cyano-pyridine ligands are twisted out of the N(4) plane, forming dihedral angles ranging from 66.5 (2) to 89.9 (2)°. In the crystal packing, columns of edge-to-edge dications define channels in which reside the anions. A range of C-H⋯N and C-H⋯O hydrogen-bonding interactions stabilizes the crystal packing.

Palladium(II) complexes of 1,10-phenanthroline: Synthesis and X-ray crystal structure determination.

Two palladium(II) complexes, [Pd(phen)(N identical withCCH(3))(2)][O(3)SCF(3)](2) (1) and [Pd(phen)(mu-OH)](2)[O(3)SCF(3)](2).2H(2)O (2) (where phen= 1,10-phenanthroline), have been crystallized following the reaction of Pd(phen)Cl(2) with silver triflate, Ag(O(3)SCF(3)), in acetonitrile and water, respectively. The structures of both complexes are based on a Pd(phen)(2+) metal core, with two acetonitrile molecules binding in a monodentate fashion in complex 1 and two hydroxo bridges holding together two cores to form a dimer in complex 2. Additionally, both complexes present a hydrogen bonded 3-D network involving the triflate anions in 1, and water and triflate anions in 2. Both complexes have been characterized by infrared and (1)H NMR spectroscopy and their crystal structures determined by X-ray crystallography.

Dinuclear palladium(ii) complexes with bridging amidate ligands.

New homonuclear dimeric Pd(ii) complexes have been synthesized by the reaction of Pd(en)(2+) or Pd(bipy)(2+) (where en = ethylenediamine and bipy = 2,2'-bipyridine) units with acetamide or by the Pd(ii) mediated hydrolysis of CH(3)CN. In these dimers the two metal centers are bridged by either two amidates or by the combination of one hydroxo group and one amidate ligand. The crystal structures of complexes {[Pd(bipy)](2)(micro-1,3-CH(3)CONH)(2)}(NO(3))(2).H(2)O.1/2(CH(3))(2)CO.1/2CH(3)CN () and {[Pd(bipy)](2)(micro-1,3-CH(3)CONH)(2)}(OTf)(2) () showed intrametallic Pd-Pd distances of 2.8480(8) A () and 2.8384(7) A (), respectively, in accordance with the accepted values for a strong Pd-Pd interaction. The presence of pi[dot dot dot]pi interactions between the bipyridine ligands on the di-micro-amidate complexes of Pd(bipy)(2+) shortens the distance between the two Pd centers and allows the formation of the metal-metal interaction. By contrast, the crystal structure of complex {[Pd(en)](2)(micro-1,3-CH(3)CONH)(2)}(OTf)(2).H(2)O (), (where OTf = triflate) where there is no pi[dot dot dot]pi interaction between the ligands on the metal centers, is also reported, and no Pd-Pd interaction is observed. Additionally, one of the complexes, {[Pd(en)](2)(micro-OH)(micro-CH(3)CONH)}(NO(3))(2) (), presents an interesting hydrogen bonded 3-D network formed by nitrate ions and water molecules. All complexes have been characterized by infrared and (1)H NMR spectroscopy.