tetra(μ-chloro)bis(μ-[2,3,5,6-tetramethyl-1,4-phenylenebis[(E)-azo-4-(n-heptoxy)-1,2-phenylene]])tetrapalladium | 1333418-80-6

• 英文名称: tetra(μ-chloro)bis(μ-[2,3,5,6-tetramethyl-1,4-phenylenebis[(E)-azo-4-(n-heptoxy)-1,2-phenylene]])tetrapalladium
• CAS: 1333418-80-6
• 化学式: C₇₂H₉₆Cl₄N₈O₄Pd₄
• 分子量: 1705.1
• InChiKey: LIPXCKOMGRMLJN-IBEGESLRSA-J

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

• 作为产物：
  描述：

  二(氰基苯)二氯化钯 、 1,4-bis[4-n-heptyloxy-(E)-phenylazo]-2,3,5,6-tetramethylbenzene 以 乙醇 为溶剂， 以77%的产率得到tetra(μ-chloro)bis(μ-[2,3,5,6-tetramethyl-1,4-phenylenebis[(E)-azo-4-(n-heptoxy)-1,2-phenylene]])tetrapalladium
  参考文献：
  名称：

  Tetrapalladium(II) Bisazobenzene and Azoazoxybenzene Complexes: Syntheses, Electronic Structures, and Optical Properties

  摘要：

  Three new tetranuclear, chloride-bridged Pd-II complexes have been prepared by using 1,4-bis[(E)-phenylazo]benzenes (BPABs) and an azoazoxybenzene derivative. The latter was obtained unexpectedly by reacting N,N-dimethy-1-4-nitrosoaniline with 2,3,5,6-tetramethylphenylenediamine in glacial acetic acid. Characterization includes H-1 NMR. and UV-vis spectroscopies, and single-crystal X-ray structures have been obtained for two of the proligands and one complex As expected, the methyl groups on the central aryl rings cause severe departures from planarity. The proligands show an intense UV absorption (lambda(max) approximate to 350 nm) due to pi -> pi* intramolecular charge transfer, together with weaker n -> pi* bands in the visible region. The complexes display an intense visible band (lambda(max) = 449-475 nm) and multiple near-UV absorptions. While the electronic absorption spectra of the BPAB complexes are quite similar, the azoazoxybenzene complex shows a doubly intense visible band. Dichroic ratios (DRs) measured in two different liquid crystal (LC) hosts show that complexation is not beneficial, as noted for dinuclear azobenzene complexes previously. The shape of the new complexes appears to give relatively poor alignment within the LC. Time-dependent density functional theory reveals differing origins of the low-energy transitions for BPAB and azoazoxybenzene complexes, those for the latter involving charge transfer within the N=N(O)C6H3NMe2 moieties. The origin of the low-energy transition of the BPAB complex also differs from that in the related dinuclear complexes. The directions of the mu(12) vectors calculated with respect to the long molecular axis generally correlate with the observed DR values, with better alignment for the low-energy transitions that are relatively more dichroic.

  DOI：

  10.1021/om200479g