Chloridobis(dimethylglyoximato-κ2N,N′)(4-methylpyridine-κN)cobalt(III) hemihydrate
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Abstract:
In the title complex, [Co(C4H7N2O2)2Cl(C6H7N)]·0.5H2O, the central CoIII ion, chelated by four N atoms of the two bidenate glyoximate ligands, exhibits a slightly distorted octahedral geometry. The axial positions are occupied by a chloride ion and the 4-methylpyridine N atom. Intermolecular O—H⋯O hydrogen bonds link the molecules in the crystal via the water molecules, while the glyoximate ligands exhibit intramolecular O—H⋯O hydrogen bonds.Keywords:
Crystal (programming language)
Hemihydrate
철결핍빈혈에서 cobalt 배설율검사의 진단적 가치를 검토할 목적으로 1974년 4월부터 1976년 4월까지 서울대학교 의과대학 부속병원 내과와 원자력병원에 입원하였던 철결핍성빈혈 22예, 재생불량성빈혈 3예, 용혈성빈혈 2예, 기타 각종질환 58예, 대조군 11예, 총계 96예를 대상으로 58CoCl2는 이용하여 cobalt 배설율검사를 시행하는 한편, 적혈구형태, 적혈구지수, 혈청철, 총철결합능, 골수철검사와 비교관찰하여 다음과 같은 결론을 얻었다. 1) 철대사와 혈액학적으로 정상이라고 생각되는 대조군의 6시간 cobalt 배설율은 평균 2.8±1.77%(1.0∼6.8%)이었으며, 24시간 cobalt 배설율은 평균 6.1±4.31%(1.9∼15.2%)였다. 2) 철결핍성빈혈의 경우에는 6시간 cobalt 배설율이 평균 18.3±5.88%(10.2∼25.0%)이었으며, 24시간 cobalt 배설율은 평균 41.8±6.83%(29.0∼54.5%)로서 대조군과 비교하여 6배이상 증가돼 있었다. 3) 골수철함량이 정상인 증례에서는 빈혈이 유무에 관계없이 6시간 및 24시간 cobalt 배설율은 모두 대조군과 유의한 차이가 없었다. 4) 6시간 cobalt 배설율과 24시간 cobalt 배설율간에는 밀접한 상관관계를 볼 수 있었으나, 실제적인 면에 있어서는 24시간 cobalt 배설율검사가 더 정확한 것으로 생각되었다. 5) 골수철함량이 정상인 증례의 24시간 cobalt 배설율은 1.2∼26.6%의 동요범위를 보인 반면, 철결핍성빈혈예의 24시간 cobalt 배설율은 29.0∼54.5%의 동요범위를 보였으며 양군간에 중복을 볼 수 없었다. 그러므로 빈혈환자에서 24시간 cobalt 배설율이 27%이상이면 철결핍성빈혈을 의심할 수 있는 것으로 생각되었다. 6) Cobalt 배설율은 골수철함량이 감소함에 따라 대체로 증가하는 경향을 보였으나 상당한 중복을 볼 수 있었고, 특히 골수철함량이 1+인 경우는 철결핍이나 골수철함량이 정상인 경우와 중복되어 통계학적으로 유의한 차이를 볼 수 없었다. 7) 골수철검사로 확인된 철결핍성빈혈의 경우, cobalt 배설율은 전예에서 증가된 반면, 적혈구형태는 40%에서, 적혈구지수는 30∼60%에서, transferrin 포화율은 70%에서 이상소견을 보였다. 이상의 성적을 종합하면 cobalt 배설율검사는 철결핍성빈혈을 진단하는데 간단하고 민감하며 정확한 검사법으로 골수철검사의 실제적인 대체검사로 이용될 수 있는 것으로 생각된다.
Cobalt extraction techniques
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The title acid, C8H7NO4.0.5H2O, crystallized in the centrosymmetric space group C2/c in a zwitterionic form (5-ammonioisophthalate), with the water molecule on a twofold axis. The three ammonio H atoms and the H atom on the remaining carboxyl group, which are involved in hydrogen bonding, are ordered. Three intermolecular N—H⋯O hydrogen bonds have N⋯O distances ranging from 2.762 (2) to 2.905 (2) Å and N—H⋯O angles ranging from 155 (2) to 163 (2)°. Two intermolecular O—H⋯O hydrogen bonds have O⋯O distances of 2.536 (2) and 2.746 (2) Å, and O—H⋯O angles of 178 (2) and 176 (2)°. A three-dimensional network of hydrogen bonds is present. Through basic second-level graphs involving acid-to-acid hydrogen bonds, chains are more numerous than rings.
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In the title hydrated mol-ecular salt, C(6)H(7)ClN(+)·C(2)HO(4) (-)·0.5H(2)O, the water O atom lies on a crystallographic twofold axis. In the crystal, the anions are linked by O-H⋯O hydrogen bonds, forming chains propagating along the b axis. These chains are inter-connected through O-H⋯O hydrogen bonds from the water mol-ecules and N-H⋯O hydrogen bonds from the cations, building layers parallel to the ab plane.
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The extensive hydrogen-bonded networks of the title compounds, C7H10O6, (I), NH4+.C6H7O6−.1/2H2O, (II), 4NH4+.C8H6O84−.H2O, (III), have been analyzed. In compound (I), layers are formed by eight-membered and 16-membered hydrogen-bonded rings. In compound (II), the anions are arranged into double chains of 30-membered rings through short hydrogen bonds. These chains are cross-linked by weaker hydrogen bonds to H2O and NH4+. In compound (III), stacks of centrosymmetric anions are connected by hydrogen bonds to H2O and NH4+.
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Abstract Der durch Umsetzung von Co(II)‐nitrat mit Pyridin erhaltene Titelkomplex (I) zeigt ähnliche magnetische und spektrale Eigenschaften wie der analoge Bis‐[trimethylphosphinoxid]‐Co(II)‐Komplex, enthält demnach zweizähnige Nitrat‐Liganden.
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The title compound, C12H23NO2·0.5H2O, crystallized with two 2-(1-amino-4-tert-butylcyclohexyl)acetic acid mol-ecules, which are present as zwitterions, and one water mol-ecule in the asymmetric unit. The mol-ecular structure of each zwitterion is stabilized by an intra-molecular six-membered (C 6 ) N-H⋯O hydrogen bond. In the crystal, the two independent zwitterions are linked head-to-head by N-H⋯O hydrogen bonds. Further O-H⋯O and N-H⋯O hydrogen bonds link the zwitterions and the water molecules, forming sandwich-like layers, with a hydrophilic filling and a hydrophobic exterior, lying parallel to the ab plane.
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Carboxylate
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The structure of 2-amino-6-chloropurine, C(5)H(4)ClN(5), (I), comprises a flat molecule, with all possible strong hydrogen-bond donors and acceptors involved in the hydrogen-bonding network. The structures of 2-amino-6-(4-chlorophenylsulfanyl)purine hemihydrate, C(11)H(8)ClN(5)S.0.5H(2)O, (II), and 2-amino-6-(4-methylphenylsulfanyl)purine 0.33-hydrate, C(12)H(11)N(5)S.0.33H(2)O, (III), have two and three unique molecules, respectively, and one water molecule in their asymmetric units. Both (II) and (III) exhibit elaborate hydrogen-bonding networks that involve the S (for both) and Cl [for (II)] atoms in addition to the expected strong hydrogen-bonding sites. Both structures also have offset-stacking formations of the phenyl and purine rings.
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Purine metabolism
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The title compound, C15H24O3·0.5H2O, crystallizes in the space group P21 with two molecules in the asymmetric unit, both with the same conformation. In the crystal structure, O—H⋯O hydrogen bonds link the two independent molecules, A and B, into an infinite chain along the a axis. These chains are further interlinked by water molecules through O—H⋯O hydrogen bonds in different directions into supramolecular arrays.
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In the title hemihydrate, 2C 13 H 10 INO 3 S·H 2 O, there are two organic molecules ( A and B ) and one water molecule in the asymmetric unit. The benzene rings are inclined to one another by 77.98 (1)° in A and 79.81 (9)° in B . The A and B molecules are connected through a water molecule via N—H...O and O—H...O hydrogen bonds. In the extended structure, the A molecules are interlinked via two water molecules through O—H...O hydrogen bonds to generate R 4 4 (12) loops. Further, the A and B molecules are linked by N—H...O hydrogen bonds, and thus an [010] chain is formed. Several C—H...O interactions extend the chains into sheet lying parallel to the ab -plane. The sheets are further extended into a three dimensional architecture via a C—H...π interaction.
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Benzamide
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