(triethylenetetraamine)cobalt(II)(H2O)2(2+) | 175671-95-1

• 分子结构分类: 有机化合物 - 有机氮化合物
• 英文名称: (triethylenetetraamine)cobalt(II)(H2O)2(2+)
• 英文别名: [Co(3,6-diaza-1,8-octanediamine)(OH2)2](2+)
• CAS: 175671-95-1；29871-98-5；175671-94-0
• 化学式: C₆H₂₂CoN₄O₂
• 分子量: 241.259
• InChiKey: HMINTIXPQVAWJH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为反应物：
  描述：

  (triethylenetetraamine)cobalt(II)(H2O)2(2+) 以 further solvent(s) 为溶剂， 生成 钴 、 H4(1,4,7,10-tetraazadecane)(4+)
  参考文献：
  名称：

  Kinetics of the acid dissociation of cyclic and open-chain tetramine complexes of cobalt(II): general acid catalysis with co-ordinating phosphate—citric acid buffers

  摘要：

  The kinetics of dissociation of the cobalt(II) complexes of the quadridentate ligands 1,4,8,11-tetra-azacyclotetradecane (cyclam). triethylenetetramine (trien) and 2,2',2'-triaminotriethylamine (tren) was followed spectrophotometrically in the ranges 10 < T < 50-degrees-C and 0.8 < pH < 4.0 in perchloric acid and McIlvaine phosphate-citrate buffer system, an an ionic strength / = 1.0 mol dm-3, NaClO4. The complexes were prepared in situ in preaerated solutions under a nitrogen atmosphere, by the addition of a 10% excess of the ligand in the form of the free base to a solution of CoCl2.6H2O. The ligand dissociation reaction was then initiated by the addition of perchloric acid or McIlvaine phosphate-citrate buffer. No dissociation was observed for the cyclam complex in perchloric acid media. It was, however, observed in the buffer and obeyed biphasic kinetics comprising two consecutive first-order steps. The action of the phosphate and/or citrate is attributed to their complexing ability and to their association through hydrogen bonding to the axial aqua ligand. thus bringing the proton closer to the dissociating nitrogen and hence catalysing the dissociation. The dissociation kinetics of the open-chain unbranched trien and the tripod tren was observed in perchloric acid as well as the McIlvaine buffer system. Except when too fast to follow by conventional spectrophotometry, the reaction obeyed biphasic kinetics comprising two consecutive first-order steps. The tren complex dissociates at a rate 5-10 times faster than that of trien, the first step being too fast to follow except at 10-degrees-C in the buffer system. The observed rate dependence is explained on the basis of mechanisms involving solvation, specific acid catalysis and general acid catalysis. The cyclam complex dissociates at a rate 5-30 times slower than those of the two open-chain complexes. This is attributed to the stabilization due to the hindered rotation of the dissociating nitrogen (entropic effect) and to the higher ligand-field stabilization of the macrocycle (enthalpic effect). Mechanisms covering the entire range of pH studied and conforming to the observed rate laws are given.

  DOI：

  10.1039/dt9930002313
• 作为产物：
  描述：

  (μ-hydroxo-μ-peroxo-bis(triethylenetetraamine)cobalt(III)2)(ClO4)3*H2O 以 水 为溶剂， 生成 (triethylenetetraamine)cobalt(II)(H2O)2(2+)
  参考文献：
  名称：

  碱性水溶液中μ-羟基-μ-过氧-双[三亚乙基四胺）钴（III）配合物的光化学

  摘要：

  在碱性水溶液中研究了标题配合物[（trien）Co（μ-OH，O 2）Co（trien）3+（1）的光化学反应。光诱导的钴（II）-三烯配合物[Co（trien）（H 2 O）2 ] 2+和[Co（OH）（trien）（H 2 O）] +在含氧碱性溶液中与双氧反应，水溶液得到中间体[[（OH）（trien ）Co-O 2 -Co（trien）（H 2 O）] 3+和[（OH）（trien ）Co-O 2 -Co（trien）（OH） ）] 2+，可逆地转换为1。使用快速光解法测量了在313 nm附近具有最大吸收的单桥μ-过氧配合物的瞬态吸收光谱。测量钴（II）-三烯配合物与双氧反应的速率常数与pH的关系。在存在和不存在双氧的情况下，长时间照射都检测到少量的[Co（trien）（H 2 O）2 ] 3+（2）。讨论了光化学反应机理，并将钴（II）-三烯配合物与双氧反应的动力学数据与通过停流法获得的动力学数据进行了比较。

  DOI：

  10.1016/s0277-5387(00)83556-1

文献信息

• Chiral Induction in the Inner-Sphere Reduction of [Co(ox)₃]³^- by [Co(2,2,2-tet)(OH₂)₂]²⁺ and Derivatives
  作者：Eileen C. Sheu、Maoyu Shang、A. Graham Lappin

  DOI：10.1021/ic951403g

  日期：1996.1.1