An extended X-ray absorption fine structure study of bis(μ-oxo) bridged dinuclear manganese co-ordination compounds containing alkali- and alkaline-earth-metal cations in a crown ether moiety †

1997 ◽  
pp. 4075-4082 ◽  
Author(s):  
Sandra Turconi ◽  
Colin P. Horwitz ◽  
Yangzhen Ciringh ◽  
Susan T. Weintraub ◽  
Joseph T. Warden ◽  
...  
Keyword(s):  
Fine Structure ◽  
Crown Ether ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Metal Cations ◽  
Structure Study ◽  
Alkaline Earth Metal ◽  
X Ray ◽  
Crown Ether Moiety ◽  
X Ray Absorption

scholarly journals A structural study of alkaline earth metal complexes with hybrid disila-crown ethers

2017 ◽  
Vol 46 (27) ◽  
pp. 8727-8735 ◽  
Author(s):  
Fabian Dankert ◽  
Kirsten Reuter ◽  
Carsten Donsbach ◽  
Carsten von Hänisch
Keyword(s):  
Crown Ether ◽  
Dft Calculations ◽  
Crown Ethers ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Complex Stability ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crown Ether Complexes

A series of disila-crown ether complexes have been characterized by single crystal X-ray diffraction. The complex stability of different systems were studied by DFT calculations and proton NMR experiments.

Sandwich-Type Complexes of Alkaline-Earth Metal Cations with a Bisstyryl Dye Containing Two Crown Ether Units

1999 ◽  
Vol 103 (50) ◽  
pp. 11188-11193 ◽  
Author(s):  
Evgeny N. Ushakov ◽  
Sergei P. Gromov ◽  
Olga A. Fedorova ◽  
Yuliya V. Pershina ◽  
Michael V. Alfimov ◽  
...  
Keyword(s):  
Crown Ether ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Metal Cations ◽  
Alkaline Earth Metal ◽  
Sandwich Type

Penta-, Hepta- und Oktaiodid-Anionen in Salzen mit Erdalkalimetall-Kronenether-Kationen / Penta-, Hepta-, and Octaiodide Anions in Salts with Alkaline Earth Metal Crown Ether Cations

2010 ◽  
Vol 65 (9) ◽  
pp. 1077-1083 ◽  
Author(s):  
Christine Walbaum ◽  
Ingo Pantenburg ◽  
Gerd Meyer
Keyword(s):  
Crown Ether ◽  
Single Crystal ◽  
Crystal Structures ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Iodine Molecule ◽  
X Ray Diffraction ◽  
X Ray ◽  
Secondary Bonding

Salts of alkaline earth metal cations sequestered in dibenzo-18-crown-6 (Db18c6) and benzo-15- crown-5 (B15c5), respectively, with I5−, I7− and I82− as the anions, have been synthesized and their crystal structures determined by single-crystal X-ray diffraction. [Ca(Db18c6)(H2O)3](I5)2- (Db18c6)(H2O) (1): monoclinic, P21 (no. 4), a = 1322.1(2), b = 1849.1(2), c = 1344.0(2) pm, β = 114.70(1)◦, V = 2985.2(6) × 106 pm3, Z = 2; [Sr(B15c5)2](I7)2 (2): triclinic, P1 (no. 2), a = 973.9(5), b = 1244.0(5), c = 1293.3(5) pm, α = 115.28(1), β = 90.18(1), γ = 104.57(1)◦, V = 1360.2(10) × 106 pm3, Z = 2; [Ba(Db18c6)2]I8 (3): orthorhombic, Pbcn (no. 60), a = 1452.0(2), b = 1924.6(2), c = 1912.1(2) pm, V = 5343.3(10) × 106 pm3, Z = 4. Compound 1 contains two crystallographically independent V-shaped pentaiodide anions, I5 −, which are linked to dimers by weak interionic contacts. The unusual heptaiodide anion, I7−, in 2 can be described as a V-shaped pentaiodide unit, which is connected to a slightly widened iodine molecule to give the rare Z form. Secondary bonding distances lead to almost planar ten-membered iodine rings, which are connected through common edges to form ribbons with staircase-like folding. 3 is built of sandwich-like cations and centrosymmetric octaiodide anions, I82−. An inspection for secondary contacts reveals that the iodine substructure of 3 consists of essentially isolated octaiodide units.

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