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2021 ◽  
Author(s):  
Jingjing Liu ◽  
Kalyan Singh ◽  
Sayan Dutta ◽  
Zhongtao Feng ◽  
Debasis Koley ◽  
...  

The reactions of dipotassium 3,4-dimethyl-2,5-bis(trimethylsilyl)-germole dianion K2[1] with YCl3 and Cp*YCl2 (Cp* = cyclopentadienyl) in THF at room temperature afforded the dianion salt [(K-cryptand-222)2][1-YCl3] (K22) and the dimeric complex [1-Y-Cp*]2...


2017 ◽  
Vol 73 (9) ◽  
pp. 688-691 ◽  
Author(s):  
Qi Wu ◽  
Zhen Yao ◽  
Jianfeng Li

Metalloporphyrin complexes containing an additional imidazole ligand can provide information about the effect of deprotonation or hydrogen bonding on the axial histidine unit in heme proteins. The title high-spin five-coordinate imidazolate-ligated iron(II) porphyrinate, [K(C18H36N2O6)][Fe(C4H5N2)(C44H28N4)]·C4H6N2·2C4H8O, has been synthesized and investigated. The solvated salt crystallizes with one 2-methylimidazole molecule, two tetrahydrofuran solvent molecules and a potassium cation chelated inside a cryptand-222 (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) molecule. The imidazolate ligand is ordered. The average Fe—Np (Np is a porphyrin N atom) bond length is 2.113 (11) Å and the axial Fe—NIm (NIm is an imidazolate N atom) is 2.0739 (13) Å. The out-of-plane displacement of the FeII atom from the 24-atom mean plane is 0.6098 (5) Å, indicating an apparent doming of the porphyrin core.


2015 ◽  
Vol 71 (10) ◽  
pp. 856-859 ◽  
Author(s):  
Qiang Yu ◽  
Diansheng Liu ◽  
Xiangjun Li ◽  
Jianfeng Li

As representative porphyrin model compounds, the structures of `picket-fence' porphyrins have been studied intensively. The title solvated complex salt {systematic name: (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane)potassium(I) [5,10,15,20-tetrakis(2-tert-butanamidophenyl)porphyrinato]iron(II)n-hexane monosolvate}, [K(C18H36N2O6)][Fe(C64H64N8O4)Cl]·C6H14or [K(222)][Fe(TpivPP)Cl]·C6H14[222 is cryptand-222 or 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane, and TpivPP ismeso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinate(2−)], [K(222)][Fe(TpivPP)Cl]·C6H14, is a five-coordinate high-spin iron(II) picket-fence porphyrin complex. It crystallizes with a potassium cation chelated inside a cryptand-222 molecule; the average K—O and K—N distances are 2.81 (2) and 3.05 (2) Å, respectively. One of the protectingtert-butyl pickets is disordered. The porphyrin plane presents a moderately ruffled distortion, as suggested by the atomic displacements. The axial chloride ligand is located inside the molecular cavity on the hindered porphyrin side and the Fe—Cl bond is tilted slightly off the normal to the porphyrin plane by 4.1°. The out-of-plane displacement of the metal centre relative to the 24-atom mean plane (Δ24) is 0.62 Å, indicating a noticeable doming of the porphyrin core.


2015 ◽  
Vol 71 (7) ◽  
pp. 545-548 ◽  
Author(s):  
Qiang Yu ◽  
Xiangjun Li ◽  
Diansheng Liu ◽  
Jianfeng Li

`Picket-fence' porphyrin compounds are used in the investigation of interactions of hemes with dioxygen, carbon monoxide, nitric monoxide and imidazole ligands. (Cryptand-222)potassium chlorido[meso-tetra(α,α,α,α-o-pivalamidophenyl)porphyrinato]manganese tetrahydrofuran monosolvate (cryptand-222 is 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane), [K(C18H36N2O6)][Mn(C64H64N8O4)Cl]·C4H8O or [K(222)][Mn(TpivPP)Cl]·THF [systematic name for TpivPP: 5,10,15,20-tetrakis(2-tert-butanamidophenyl)porphyrin], is a five-coordinate high-spin manganese(II) picket-fence porphyrin complex. It crystallizes with a potassium cation chelated inside a cryptand-222 molecule; the average K—O and K—N distances are 2.83 (4) and 2.995 (13) Å, respectively. All four protectingtert-butyl pickets of the porphyrin are ordered. The porphyrin plane is nearly planar, as indicated by the atomic displacements and the dihedral angles between the mean planes of the pyrrole rings and the 24-atom mean plane. The axial chloride ligand is located inside the molecular cavity on the hindered porphyrin side and the Mn—Cl bond is tilted slightly off the normal to the porphyrin plane by 3.68 (2)°. The out-of-plane displacement of the metal centre relative to the 24-atom mean plane (Δ24) is 0.7013 (4) Å, indicating a noticeable porphyrin core doming.


2013 ◽  
Vol 87 (10) ◽  
pp. 1627-1631
Author(s):  
S. Dolatshahi ◽  
G. H. Rounaghi ◽  
S. Tarahomi
Keyword(s):  

2009 ◽  
Vol 65 (8) ◽  
pp. m967-m968 ◽  
Author(s):  
Mondher Dhifet ◽  
Mohamed Salah Belkhiria ◽  
Jean-Claude Daran ◽  
Habib Nasri
Keyword(s):  

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