Optically active hydrocarbon polymers with aromatic side chains. 13. Structural analysis of (S)-4-methyl-1-hexene/styrene copolymers by carbon-13 NMR spectroscopy

1985 ◽  
Vol 18 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Anna Laura Segre ◽  
M. Delfini ◽  
M. Paci ◽  
A. M. Raspolli-Galletti ◽  
Roberto Solaro
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Analysis ◽  
Optically Active ◽  
Side Chains ◽  
Styrene Copolymers ◽  
Hydrocarbon Polymers ◽  
Aromatic Side Chains

Optically active hydrocarbon polymers with aromatic side chains

1981 ◽  
Vol 5-5 (9-10) ◽  
Author(s):  
Carlo Bertucci ◽  
Carlo Carlini ◽  
Francesco Ciardelli ◽  
Carlo Rosini ◽  
Piero Salvadori
Keyword(s):  
Optically Active ◽  
Side Chains ◽  
Hydrocarbon Polymers ◽  
Aromatic Side Chains

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

1999 ◽  
Vol 64 (6) ◽  
pp. 977-985 ◽  
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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