Bis(2,2′-bipyridine-κ2N,N′)(nitrato-κ2O,O′)cobalt(II) iodide tetrahydrate (original) (raw)
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fac-Triaqua(2,2′-bipyridine-κ2 N,N′)(nitrato-κO)cobalt(II) chloride
IUCrData, 2018
The asymmetric unit of the title complex, [Co(NO3)(C10H8N2)(H2O)3]Cl, consists of a chloride anion and a complex cation, which is built on a monodentate nitrate anion, three water molecules and one bidentate 2,2′-bipyridine molecule, coordinated to a CoII cation, in a distorted octahedral geometry. The water molecules are arranged in a facial geometry, and serve as donors for hydrogen bonding. Acceptor sites in the crystal are chloride ions and one O atom of the coordinating nitrate ion. A three-dimensional framework is formed, based on O—H...O and O—H...Cl contacts.
Studies on cobalt(II) complexes with N,N,N',N'-tetraethylpyridine-2,6-dicarboxamide(L1) containing PF6-,BFf4-, ClO4- and NO3- anions : X-ray crystal structures of Co (L1)2 (CH3CN)2 and CO(L1)2(H2O)22H2O(X = PF-6, ClO4-)
Polyhedron, 2006
The ligand N,N,N 0 ,N 0 -tetraethylpyridine-2,6-dicarboxamide (L 1 and abbreviated as deap) reacts with CoX 2 ðX ¼ PF 6 À ; BF À 4 ; ClO 4 À and NO À 3 Þ salts to give the octahedral complexes, [Co(L 1 ) 2 (CH 3 CN)](PF 6 ) 2 (1) and ½CoðL 1 Þ 2 ðH 2 OÞ 2 ðXÞ 2 Á H 2 O ðX ¼ PF 6 À ð2Þ; BF 4 À ð3Þ; ClO 4 À ð4Þ and NO 3 À ð5Þ. The compounds have been characterised by elemental analysis, IR spectroscopy and X-ray crystallography. The composition of the product is dependant upon the nature of the reaction medium. Compound 1 contains ON and ONO bonded deap ligands in bidentate and tridentate coordinating modes, in which the coordination sphere of the Co 2+ ion is completed by attachment of an acetonitrile molecule. Compounds 2 and 4 have identical cationic species [Co(L 1 ) 2 (H 2 O)] 2+ in which Co 2+ is bonded by deap ligands in a bidentate ON mode. As deap is coordinating in a bidentate mode, the two coordinating water molecules are placed cis to each other in the octahedral arrangement.
Inorganic Chemistry, 2001
The reaction of M(ox)‚2H 2 O (M ) Co(II), Ni(II)) or K 2 (Cu(ox) 2 )‚2H 2 O (ox ) oxalate dianion) with n-ampy (n ) 2, 3, 4; n-ampy ) n-aminopyridine) and potassium oxalate monohydrate yields one-dimensional oxalatobridged metal(II) complexes which have been characterized by FT-IR spectroscopy, variable-temperature magnetic measurements, and X-ray diffraction methods. The complexes M(µ-ox)(2-ampy) 2 (M ) Co (1), Ni (2), Cu ) are isomorphous and crystallize in the monoclinic space group C2/c (No. 15), Z ) 4, with unit cell parameters for 1 of a ) 13.885(2) Å, b ) 11.010(2) Å, c ) 8.755(1) Å, and ) 94.21 , Ni (5), Cu ) are also isomorphous and crystallize in the orthorhombic space group Pcnn (No. 52), Z ) 8, with unit cell parameters for 6 of a ) 12.387 , b ) 12.935(3), and c ) 18.632(2) Å. Compound Co(µ-ox)(4-ampy) 2 (7) crystallizes in the space group C2/c (No. 15), Z ) 4, with unit cell parameters of a ) 16.478(3) Å, b ) 5.484(1) Å, c ) 16.592(2) Å, and ) 117.76(1)°. Complexes M(µ-ox)(4-ampy) 2 (M ) Ni (8), Cu (9)) crystallize in the orthorhombic space group Fddd (No. 70), Z ) 8, with unit cell parameters for 8 of a ) 5.342(1), b ) 17.078 , and c ) 29.469(4) Å. All compounds are comprised of one-dimensional chains in which M(n-ampy) 2 2+ units are sequentially bridged by bis-bidentate oxalato ligands with M‚‚‚M intrachain distances in the range of 5.34-5.66 Å. In all cases, the metal atoms are six-coordinated to four oxygen atoms, belonging to two bridging oxalato ligands, and the endo-cyclic nitrogen atoms, from two n-ampy ligands, building distorted octahedral surroundings. The aromatic bases are bound to the metal atom in cis (1-6) or trans (7-9) positions. Magnetic susceptibility measurements in the temperature range of 2-300 K show the occurrence of antiferromagnetic intrachain interactions except for the compound 3 in which a weak ferromagnetic coupling is observed. Compound 7 shows spontaneous magnetization below 8 K, which corresponds to the presence of spin canted antiferromagnetism.
Crystal Structure of cis-Bis(2,2′-bipyridyl)dichlorocobalt(III) Nitrate Methanol Solvate
X-ray Structure Analysis Online
The coordination chemistry of cobalt(III) has been investigated because of their redox and magnetic properties. On the basis of these properties, recently there are many reports concerning cobalt(III) complexes for applications in biology, medicine, and photocatalists. 1,2 Especially cobalt(III) complexes with two polypyridyl ligands at the cis-position of each other, such as cis-[CoCl2(N-N)2] + or cis-[Co(CO3)(N-N)2] + (N-N = 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen) etc.), have been prepared. These are not only used as starting materials for many functional complexes, 4,5 but also the cis-bis(N-N)cobalt(III) complexes have been investigated concerning their chemical and biological properties. 6 In 2016, the crystal structure and anticancer activity of cis-[CoCl2(bpy)2](NO3)·2H2O were reported by Das and co-workers. The structure parameters of a cation part were similar to those of the previously reported crystal structure, [CoCl2(bpy)2]Cl·2H2O. 7 Das and co-workers focused on 1-D water-anion chains, which were ladder-shape hydrogen bonding networks between counter ions, NO3 -, and square units of four lattice water molecules connected by hydrogen bonding interactions, in the crystal, because polypyridyl moieties that were present in biological molecules might stabilize various water topologies in the environment, resembling those in living system. They concluded that the water-nitrate cluster might bring to light, yet different novel, mode of cooperative association of water molecules with nitrate anions. It brought about an efficient cleavage of double-stranded DNA without the requirement of an external agent in a concentration-dependent manner. 6 Similar 1-D water-anion chains were also observed in the Cl-salt, 7 though it is not described in this report. These crystal structures of cis-[CoCl2(bpy)2](X)·2H2O (X = Clor NO3 -) 6,7 indicated that a complex cation, cis-[CoCl2(bpy)2] + , would have two kinds of 1-D chains in the crystal without depending on a kind of counter ion. Herein, we report on the crystal structure of cis-[CoCl2(bpy)2](NO3)·CH3OH , and compare it with cis-[CoCl2(bpy)2](X)·2H2O (X = Clor NO3 -) 6,7 to find the feature of the cis-[CoCl2(bpy)2] + complex in the crystal. In the result, we found that the cationic part in this complex was also similar to those in two previously reported complexes, although this crystal had no 1-D water-anion chains. We particularly describe the relationship among cation complexes, NO3anions, and methanol molecules in the crystal.
Inorganica Chimica Acta, 2002
A series of complexes of the type trans -[Co(III)(bpb)(amine) 2 ]X (X 0/NCS, amine 0/pyrrolidine (prldn) (1), benzylamine (bzlan) (2), and X 0/ClO 4 , amine0/pyrrolidine (prldn) (3), benzylamine (bzlan) (4), piperidine (pprdn) (5), morpholine (mrpln) (6), and bpb 0/N ,N ?-bis(2-pyridinecarboxamide)-1,2-benzene dianion) have been synthesized and characterized by elemental analyses, IR, UV Á/Vis, and 1 H NMR spectroscopy. The crystal and molecular structure of 1 ×/0.5H 2 O was determined by X-ray crystallography. The compound crystallizes in the triclinic space group P/1; a 0/9.4059(8) Å , b 0/11.3047(10) Å , c 0/12.8451(11) Å , a 0/81.984(2)8, b 0/83.761(2)8, g 0/85.456(2)8, V 0/1341.6(2) Å 3 , Z0/2 and final R 1 0/0.039 (wR 2 0/0.0625) for 5723 independent reflections with I /2s (I ) and 368 parameters. The structure consists of chains of complexes linked by moderately strong N Ã/HÁ Á ÁOÄ/C hydrogenbonds zig-zagging along the c lattice translation. The IR, UV Á/Vis, and 1 H NMR spectra of the complexes are also discussed. #