Bis[μ-3,5-bis­(2-pyrid­yl)pyrazolato]bis­(hydrogensulfato)­dicopper(II) methanol disolvate

The title compound, [Cu2(C13H9N4)2(HSO4)2]·2CH3OH, consists of discrete centrosymmetric dinuclear complex mol­ecules and methanol solvent mol­ecules. The CuII atom shows a square-pyramidal coordination geometry and is bonded to four N atoms of the two bis-chelating 3,5-bis­(2-pyrid­yl)pyrazol­ate ions (bpypz−) and one O atom of the hydrogensulfate ion. The bpypz− ligands in the complex mol­ecule are virtually coplanar [dihedral angle between the mean ligand planes = 0.000(1)°] with the CuII atom deviating in opposite directions from their best plane by 0.2080 (12) Å. π–π stacking inter­actions between the pyridyl and pyrazole rings [centroid–centroid distance = 3.391 (3) Å] and strong O—H⋯O hydrogen bonds between the hydrogensulfate ligands and the methanol mol­ecules assemble the mol­ecules into a one-dimensional polymeric structure extending along the a axis. The methanol mol­ecule acts both as an accepter and a donor in the hydrogen bonding

Percutaneous Endoscopic Gastrostomy, Duodenostomy and Jejunostomy

Although enteral feeding by nasal gastric tube is popular for the patients who have a swallowing disability and require long-term nutritional support, but have intact gut, this tube sometimes causes aspiration pneumonia or esophageal ulcer. For these patients, conventional techniques for performance of a feeding gastrostomy made by surgical laparotomy have been used so far. However, these patients are frequently poor anesthetic and operative risks. Percutaneous endoscopic gastrostomy (PEG) which can be accomplished with local anesthesia and without the necessity for laparotomy has become popular in the clinical treatment for these patients. PEG was performed in 31 cases, percutaneous endoscopic duodenostomy (PED) in 1 case, and percutaneous endoscopic jejunostomy (PEJ) in 2 cases. All patients were successfully placed, and no major complication and few minor complications (9%) were experienced in this procedure. After this procedure, some patients could discharge their sputa easily and their pneumonia subsided. PED and PEJ for the patients who had previously received gastrostomy could also be done successfully with great care. Our experience suggests that PEG, PED, and PEJ are rapid, safe, and useful procedures for the patients who have poor anesthetic or poor operative risks

Structural difference due to intramolecular stacking interactions in dinuclear rhodium(III) complexes [{Rh(η5-C5Me5)(L)}2]n+containing pyrimidine-2-thionate and related ligands

Self-assembling reactions between [Rh(η5-C5Me5)(H2O)3]2+and pyrimidine-2-thionate(pymt) or related ligands[L; mpymt = 4-methyl-pyrimidine-2-thionate(1-), dmpymt = 4,6-dimethylpyrimidine-2-thionate(1-), apymt = 4-aminopyrimidine-2-thionate(1-), dapymt = 4,6-diaminopyrimidine-2-thionate(1-), or mpol = 2-sulfanyl-3-pyridinolate(2-)] were carried out and the products characterized by UV/vis, NMR spectroscopy, electrospray ionization mass spectrometry, and crystal structure analysis. All products are dinuclear rhodium(III) complexes of [{Rh(η5-C5Me5)(L)}2]n+: three crystal structures with mpymt, dmpymt and mpol were determined. The mpymt and dmpymt ligands co-ordinate through a 1κ2N,S:2κS mode and the two pyrimidine rings are located in cis position,whereas mpol adopts a five-membered chelating mode with 1κ2S,O:2κS and the two pyrimidine rings are located in trans position. Such structural difference can reasonably be explained by the　intramolecular stacking interaction between the two bridging ligands

Bis[μ-3,5-bis(pyridin-2-yl)-1H-pyrazole]bis[dibromidoiron(III)]

The title dinuclear complex, [Fe2Br4(C13H9N4)2], which lies on an inversion center, features two approximately planar bis(pyridin-2-yl)pyrazole (bpypz−) ligands [maximum deviation = 0.082 (3) Å] and four bromide ions. Each FeIII ion is octahedrally coordinated by four N atoms of two bpypz− ligands and two Br ions. π–π stacking interactions [centroid–centroid distances = 3.7004 (17)–4.0123 (18) Å] are observed between pyridyl and pyrazole rings, and between pyridyl and pyridyl rings of adjacent complex molecules

catena-Poly[[bis(ethanol-κO)manganese(II)]-μ-2,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,4-bis(olato)-κ4O1,O6:O3,O4]

In the title coordination polymer, [Mn(C6Cl2O4)(C2H5OH)2]n, the MnII atom and the chloranilate [systematic name: 2,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,4-bis(olate)] ion lie on crystallographic inversion centers. The geometry around the MnII atom is a distorted octahedron involving four O atoms of two chloranilate ions and two O atoms from two ethanol molecules. The chloranilate ion serves as a bridging ligand between the MnII ions, leading to an infinite linear chain along the b-axis direction. The chains are linked by O—H...O hydrogen bonds between the apically coordinating ethanol molecule and the chloranilate ion, affording a two-dimensional layer expanding parallel to the ab plane

Bis[tetrakis(pyridin-2-yl)methane-κ3N,N′,N′′]cobalt(II) tetrakis(thiocyanato-κN)cobaltate(II) methanol monosolvate

The title complex, [Co(C21H16N4)2][Co(NCS)4]·CH3OH, consists of one [Co{C(py)4}2]2+ complex cation [C(py)4 = tetrakis(pyridin-2-yl)methane], one [Co(NCS)4]2− complex anion and a methanol solvent molecule. In the cation, the CoII atom is coordinated by six N atoms of two C(py)4 ligands in a distorted octahedral geometry. In the anion, the CoII atom is coordinated by the N atoms of four NCS− ligands in a distorted tetrahedral geometry. The methanol molecule is disordered and was modelled over three orientations (occupancies 0.8:0.1:0.1). There are two weak hydrogen-bond-like interactions between the methanol solvent molecule and NCS− ligands of the anion [O...S = 3.283 (3) and 3.170 (2) Å]

catena-Poly[[[(2,2′-bipyridine-κ2N,N′)manganese(II)]-μ-(2,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,4-diolato)-κ4O1,O6:O3,O4] ethanol disolvate]

The asymmetric unit of the title coordination polymer, {[Mn(C6Cl2O4)(C10H8N2)]·2C2H5OH}n, consists of one MnII ion, one 2,2′-bipyridine (bpy) ligand, one chloranilate (CA2−) ligand and two ethanol solvent molecules. The MnII ion is octahedrally coordinated by two N atoms of one bpy ligand and four O atoms of two chloranilate ions. The chloranilate ion serves as a bridging ligand between the MnII ions, leading to an infinite zigzag chain along [101]. π–π stacking interactions [centroid–centroid distance = 4.098 (2) Å] is observed between the pyridine rings of adjacent chains. The ethanol molecules act as accepters as well as donors for O—H...O hydrogen bonds, and form a hydrogen-bonded chain along the a axis. The H atoms of the hydroxy groups of the two independent ethanol molecules are each disordered over two sites with equal occupancies