The (η-1,7'-2,2')4,8'-8,4'-(Bis-μ-o-phenylene)bisdicarbollidocobalt(1-)ate Ion [3-Co-4,8'-8,4'(o-C6H4)2(1,2-C2B9H9)2](-). The First Doubly Bridged Metallacarborane Complex. Synthesis, Properties and Structure

Jaromír Plešek; Stanislav Heřmánek

doi:10.1135/cccc19951297

The (η-1,7'-2,2')4,8'-8,4'-(Bis-μ-o-phenylene)bisdicarbollidocobalt(1-)ate Ion [3-Co-4,8'-8,4'(o-C6H4)2(1,2-C2B9H9)2](-). The First Doubly Bridged Metallacarborane Complex. Synthesis, Properties and Structure

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19951297 ◽

1995 ◽

Vol 60 (8) ◽

pp. 1297-1302 ◽

Cited By ~ 13

Author(s):

Jaromír Plešek ◽

Stanislav Heřmánek

Keyword(s):

Sandwich Complex ◽

Counter Ion ◽

Synthesis Properties

The first cobaltacarborane sandwich complex [3-Co-4,8'-8,4'(o-C6H4)2(1,2-C2B9H9)2](-) with two o-phenylene bridges between both deltahedral ligands is described. Phenylene rings containing angle of 72 grad bind the Cs counter-ion probably via π-donation. This is why the solubility of Cs salt in water is extremely low. Synthesis, properties and structure of the Cs salt are described.

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A new bifunctional ligand: C5Me4SiMe2OSiMe2O2−. Synthesis, properties and crystal structure of the first Yb(II) half-sandwich complex with a heterobidentate cyclopentadienyl ligand, [{(η5-C5Me4)SiMe2OSiMe2(η1-O)}Yb(thf)]2

Chemical Communications ◽

10.1039/a906741h ◽

1999 ◽

pp. 2203-2204 ◽

Cited By ~ 14

Author(s):

Alexander A. Trifonov ◽

Evgenii N. Kirillov ◽

Mikhail N. Bochkarev ◽

Axel Fischer ◽

Frank T. Edelmann

Keyword(s):

Crystal Structure ◽

Sandwich Complex ◽

Bifunctional Ligand ◽

Cyclopentadienyl Ligand ◽

Synthesis Properties ◽

Half Sandwich

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The Temperature and Counter-ion Dependency of Cation Exchange Equilibria

Zeitschrift für Physikalische Chemie ◽

10.1524/zpch.1960.25.1_2.081 ◽

1960 ◽

Vol 25 (1_2) ◽

pp. 81-89 ◽

Cited By ~ 21

Author(s):

O. D. Bonner ◽

G. Dickel ◽

H. Brümmer

Keyword(s):

Cation Exchange ◽

Counter Ion

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Synthesis, Properties, and in vivo Testing of Biogenic Ferrihydrite Nanoparticles

Bulletin of the Russian Academy of Sciences Physics ◽

10.3103/s106287382011026x ◽

2020 ◽

Vol 84 (11) ◽

pp. 1366-1369

Author(s):

S. V. Stolyar ◽

V. P. Ladygina ◽

A. V. Boldyreva ◽

O. A. Kolenchukova ◽

A. M. Vorotynov ◽

...

Keyword(s):

Synthesis Properties ◽

In Vivo Testing

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Reactivity of Sodium Hexaethyl-2,4-dicarba-nido-hexaborate(1-)

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19990977 ◽

1999 ◽

Vol 64 (6) ◽

pp. 977-985 ◽

Cited By ~ 17

Author(s):

Bernd Wrackmeyer ◽

Hans-Jörg Schanz ◽

Wolfgang Milius ◽

Catherine McCammon

Keyword(s):

Mössbauer Spectroscopy ◽

Nmr Spectroscopy ◽

Structural Analysis ◽

Hydrogen Atom ◽

Mossbauer Spectroscopy ◽

Sandwich Complex ◽

X Ray ◽

Bromo Derivative ◽

Boron Tribromide ◽

C Nmr

Sodium hexaethyl-2,4-dicarba-nido-hexaborate(1-) (6), available from hexaethyl-2,4-dicarba- nido-hexaborane(8) (4) by deprotonation, reacts with deuterated methanol, CD3OD, to give back 4 without H/D exchange of the B-H-B hydrogen atom. The reaction of 6 with diethylboron chloride, Et2BCl, affords hexaethyl-2,4-dicarba-closo-hexaborane(6) (7), the first example of a peralkylated carborane of this type. In contrast, the reaction of 6 with boron tribromide, BBr3, leads mainly to 2,3,4,5,6,7-hexaethyl-2,4-dicarba-closo-heptaborane(7) (8), together with the corresponding 1-bromo derivative (9) and the closo-carborane 7 as side products. The reaction of two equivalents of 6 with FeCl2 gives the air-stable sandwich complex bis[hexaethyl-2,4-dicarba-nido-hexaborate(1-)]iron 10 which was characterised by X-ray structural analysis. All products were characterised by 1H, 11B and 13C NMR spectroscopy, and 57Fe Mössbauer spectroscopy was used to study 10.

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Determination of Organic Bases by Ion-Pair Extraction Polarography Using Orange II as Counter Ion

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19922272 ◽

1992 ◽

Vol 57 (11) ◽

pp. 2272-2278 ◽

Cited By ~ 2

Author(s):

Václav Koula ◽

Daria Kučová ◽

Jiří Gasparič

Keyword(s):

Model Compound ◽

Differential Pulse ◽

Ion Pair ◽

Differential Pulse Polarography ◽

Orange Ii ◽

Organic Bases ◽

Counter Ion ◽

Pulse Polarography ◽

Ammonium Compounds

The combination of ion-pair extraction and differential pulse polarography is shown to be a method suitable for the determination of 10-7 mol l-1 concentrations of organic bases of quaternary ammonium compounds. Orange II (4-[2-hydroxy-1-naphtyl]azobenzenesulfonic acid) was found to be an appropriate polarographically active counter-ion. The proposed method was used for the determination of tetrapentylammonium bromide (as model compound), Septonex ([1-(ethoxycarbonyl)-pentadecyl]trimethylammonium bromide) and codeine.

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Bis(monoazacrown ethers) with an electron-donating substituent at the hinge: A pronounced participation of hydroxyl group in formation of sodium ion sandwich complexes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19891043 ◽

1989 ◽

Vol 54 (4) ◽

pp. 1043-1054 ◽

Cited By ~ 3

Author(s):

Jiří Závada ◽

Juraj Koudelka ◽

Petr Holý ◽

Martin Bělohradský ◽

Ivan Stibor

Keyword(s):

Complex Formation ◽

Sandwich Structure ◽

Sodium Ion ◽

Hydroxyl Group ◽

Complex Stability ◽

Sandwich Complexes ◽

Sandwich Complex ◽

Marked Enhancement ◽

Stability Data ◽

Potentiometric Data

Sodium ion complex formation has been investigated potentiometrically in four homologous bis(crown) series I-IV differing by the nature of substituent placed at the linking trimethylene chain (X = OH, OCH3, OCH2C6H5 and H respectively). A marked enhancement of the complex stability has been observed in the bis(crown) series I and attributed to participation of the lateral hydroxyl group in the sandwich complex formation. Evidence in support of the sandwich structure has been provided (i) by analysis of the potentiometric data indicating a 1:1 complex stoichiometry and (ii) by a comparison of the complex stability data from the bis(crown) series I with the corresponding values from related monocyclic ligand series V, VI and VII revealing a pronounced cooperation of both macrorings in the sodium ion-bis(crown) I complex formation.

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