The Solution Structures and Dynamics and the Solid-State Structures of Substituted Cyclopentadienyltitanium(IV) Trifluorides

2006 ◽  
Vol 45 (19) ◽  
pp. 7915-7921 ◽  
Author(s):  
Franc Perdih ◽  
Andrej Pevec ◽  
Saša Petriček ◽  
Andrej Petrič ◽  
Nina Lah ◽  
...  
Keyword(s):  
Solid State ◽  
Solution Structures ◽  
Solid State Structures

The solution structures of chiral Ti4+ alkoxides

1989 ◽  
Vol 67 (10) ◽  
pp. 1523-1537 ◽  
Author(s):  
Pierre G. Potvin ◽  
Robert Gau ◽  
Patrick C. C. Kwong ◽  
Stephen Bianchet
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Tartaric Acid ◽  
Temperature Dependent ◽  
Solution Structures ◽  
Tartaric Acid Derivatives ◽  
Nuclear Magnetic Resonance Spectra ◽  
Solid State Structures ◽  
Magnetic Resonance Spectra

1,4-Di-O-methyl-L-threitol and 1,2,5,6-tetra-O-methyl-L-mannitol were prepared by new, more convenient, and higher yielding routes. These and 1,2;5,6-di-O-isopropylidene-D-mannitol formed 2:2 complexes with Ti(OiPr)4, but did not readily form 1:2 complexes in the presence of excess Ti4+. 1H and 13C nuclear magnetic resonance spectra showed that the structures in solution of the 2:2 complexes were analogous to solid-state structures of tartaric acid derivatives, i.e., possessing bridging diolate oxygens. In contrast, R,R- and meso-diisopropyl tartrates, Ν,Ν′-dibenzyl tartramide, and Ν,Ν′-di(2-phenyl)ethyl tartramide behaved very differently. The tartramides formed mixtures of complexes that became dominated by 2:3 complexes in the presence of excess Ti(OiPr)4. Two tertiary tartramides failed to provide well-defined complexes. The R,R-tartrate formed a monocyclic (nonbridged) 2:2 complex, but an equilibrating mixture of 1:2 and 2:2 complexes with excess Ti4+. The equilibrium shifted upon cooling toward a 1:2 complex possessing a bridging diolate oxygen, as did the meso 1:2 complex. Other temperature-dependent phenomena were also studied. Keywords: titanium(IV), chiral alkoxides, solution structures, NMR, Sharpless catalysts.

Synthesis and solid state structures of macromolecular cylindrical brushes with varying side chain length

Polymer ◽  
2004 ◽  
Vol 45 (12) ◽  
pp. 4009-4015 ◽  
Author(s):  
Bin Zhang ◽  
Shanju Zhang ◽  
Lidia Okrasa ◽  
Tadeusz Pakula ◽  
Tim Stephan ◽  
...  
Keyword(s):  
Solid State ◽  
Chain Length ◽  
Side Chain ◽  
Side Chain Length ◽  
Solid State Structures

Intramolecular London Dispersion Interaction Effects on Gas-Phase and Solid-State Structures of Diamondoid Dimers

2017 ◽  
Vol 139 (46) ◽  
pp. 16696-16707 ◽  
Author(s):  
Andrey A. Fokin ◽  
Tatyana S. Zhuk ◽  
Sebastian Blomeyer ◽  
Cristóbal Pérez ◽  
Lesya V. Chernish ◽  
...  
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Interaction Effects ◽  
Dispersion Interaction ◽  
London Dispersion ◽  
Solid State Structures
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