National Repository of Grey Literature 25 records found  beginprevious16 - 25  jump to record: Search took 0.00 seconds. 
(Tetramethylcyklobutadien)kobaltové komplexy s fosfadikarbollidovými a trikarbollidovýmy ligandy
Mutseneck, EV. ; Holub, Josef ; Petrovskii, PV. ; Starikova, ZA. ; Zanello, P. ; Štíbr, Bohumil ; Kudinova, AR.
(Cyclopentadienyl)iron complexes with phosphadicarbollide and tricarbollide ligands have been prepared recently.
Chemie "helmet" aniontu : hypho--[C2B6H13](-)
Londesborough, Michael Geoffrey Stephen ; Janoušek, Zbyněk ; Hnyk, Drahomír ; Štíbr, Bohumil
The geometries and electron-counts of the vast majority of known carborane species fall under the structural catagories of closo, nido and arachno carboranes.
Postupná degradace dekaboranu na malé monokarbaboranové sloučeniny
Holub, Josef ; Bakardjiev, Mario ; Hnyk, Drahomír ; Štíbr, Bohumil
How much difficult is the life of a boron-cluster chemist wanting to prepare smaller-cage monocarboranes from the commercially available decaborane is demonstrated by the Scheme.
Inzerce síry do malých karbaboranů a inzerce uhlíku do thiaboranů
Jelínek, Tomáš ; Holub, Josef ; Štíbr, Bohumil
The reaction between elemental sulphur and smaller carbaboranes, such as arachno-4-CB8H14, arachno-4,5-C2B7H13, and range of other carbaboranes, provide a wide variety of products engendered from the simple insertion of sulphur into their skeletons.
Stereochemie karboranů vznikajících sedmistupňovou degradací dekaboranu
Hnyk, Drahomír ; Štíbr, Bohumil
The final level of geometry optimizations of these clusters of various molecular shapes included the effect of electron correlation, which considerably improved the fit between the calculated (GIAO-SCF or GIAO-MP2) and experimental 11B chemical shifts.
Neočekávaná reakce derivátů closo-thiadodekaboranu s fenylmagnesium bromidem
Císařová, I. ; Fusek, Jiří ; Macháček, Jan ; Plzák, Zbyněk
Derivatives of closo-thiadodecaborane, closo-SB11H11, undergo an unexpected hydrogen substitution under reaction with phenylmagnesium bromide.
Syntéza a přesmyky komplexů přechodných prvků s trikarbollidovými ligandy
Perekalin, DS. ; Holub, Josef ; Štíbr, Bohumil ; Kudinov, AR.
In continuation of the previous studies, we investigated the reactions of tricarbollide anions with various cationic metal-complex fragments. It was shown that the complexation is accompanied by an unusual low-temperature polyhedral rearrangement. Several examples for complexes with the amino-substituted anion are given below.
Supramolekulární variace založené na kobalt bis(dokarbollidovém) iontu(1-)
Grüner, Bohumír ; Mikulášek, Libor ; Báča, Jiří ; Císařová, I. ; Bőhmer, V.
Continuing interest in the development of liquid-liquid extraction and biomedicinal applications of [(1,2-C2B9H11)-3-Co]- anion (1), studied systematically in collaboration with other Groups, prompted us to explore the scope and limitations to create molecular systems containing several hydrophobic anions covalently bound together by simple organic bridging moieties or pre-organized on various supramolecular platforms.
Nukleofilní B-arylace na monokarbadodekaboranovém skeletu katalyzovaná Li (+)
Janoušek, Zbyněk ; Lehman, U. ; Častulík, J. ; Michl, J.
We are interested in the 12-vertex closo-carborane CB11H12- 1 with aryl substituents in positions 1 and 12, and its permethylated derivative, CHB11Me11- 2, in connection with the synthesis of rod like structures.
Chemie klastrových boranový analogů cyklopentadienidového aniontu a ferrocenu
Štíbr, Bohumil
Isomeric tricarbollide and phosphacarbollide anions of general nido structures [7,8,9-E3B8H8](1-) and [7,8,10-E3B8H8](2-)are borane-cluster analogues of the cyclopentadienide anions as they are monoanionic and contain an open pentagonal face capable of donatig five electrons into the metal shell.

National Repository of Grey Literature : 25 records found   beginprevious16 - 25  jump to record:
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