Synthesis of Rhodium Complexes with Novel Perfluoroalkyl Substituted Cyclopentadienyl Ligands

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Title:Synthesis of Rhodium Complexes with Novel Perfluoroalkyl Substituted Cyclopentadienyl Ligands
Creators:
Čermák, Jan
Auerová, Kateřina
Nguyen, Huong Thi Thu
Blechta, Vratislav
Vojtíšek, Pavel
Kvíčala, Jaroslav
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 66, 2, pp. 382-396
Uncontrolled Keywords:Sandwich complexes, Carbonyl complexes, Fluorous biphasic catalysis, Rhodium, Fluorophilic ligands, Fluorinated compounds, Cyclopentadienes

Abstract

Mixtures of isomers of (perfluoroalkyl)tetramethylcyclopenta-1,3-dienes (CH<sub>3</sub>)<sub>4</sub>C<sub>5</sub>H(CF<sub>2</sub>)<i><sub>n</sub></i>CF<sub>3</sub> (<i>n</i> = 3, 5, 7, 9) were synthesized as precursors of new cyclopentadienyl ligands for organotransition metal catalysis in fluorous biphase media and characterized by combination of GC-MS and <sup>13</sup>C NMR spectroscopy. Rhodium(III) chloro complexes [Rh{(CH<sub>3</sub>)<sub>4</sub>C<sub>5</sub>(CF<sub>2</sub>)<i><sub>n</sub></i>CF<sub>3</sub>}Cl<sub>2</sub>]<sub>2</sub> and rhodium(I) carbonyl complexes [Rh{(CH<sub>3</sub>)<sub>4</sub>C<sub>5</sub>(CF<sub>2</sub>)<i><sub>n</sub></i>CF<sub>3</sub>}(CO)<sub>2</sub>] were prepared from the cyclopentadienes and molecular structure of [Rh{(CH<sub>3</sub>)<sub>4</sub>C<sub>5</sub>(CF<sub>2</sub>)<sub>5</sub>CF<sub>3</sub>}Cl<sub>2</sub>]<sub>2</sub> was determined by X-ray diffraction. The ligands are electronically close to the unsubstituted cyclopentadienyl as shown by values of carbonyl stretching frequencies in the carbonyl complexes. Neither carbonyl frequencies nor NMR chemical shifts of the complexes are substantially affected by the length of the perfluoroalkyl chain. <p>

Title:Synthesis of Rhodium Complexes with Novel Perfluoroalkyl Substituted Cyclopentadienyl Ligands
Creators:
Čermák, Jan
Auerová, Kateřina
Nguyen, Huong Thi Thu
Blechta, Vratislav
Vojtíšek, Pavel
Kvíčala, Jaroslav
Uncontrolled Keywords:Sandwich complexes, Carbonyl complexes, Fluorous biphasic catalysis, Rhodium, Fluorophilic ligands, Fluorinated compounds, Cyclopentadienes
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:66
Number:2
Page Range:pp. 382-396
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20010382UNSPECIFIED
ID Code:1795
Item Type:Article
Deposited On:06 Feb 2009 17:12
Last Modified:06 Feb 2009 16:12

Citation

Čermák, Jan; Auerová, Kateřina; Nguyen, Huong Thi Thu; Blechta, Vratislav; Vojtíšek, Pavel; Kvíčala, Jaroslav (2001) Synthesis of Rhodium Complexes with Novel Perfluoroalkyl Substituted Cyclopentadienyl Ligands. Collection of Czechoslovak Chemical Communications, 66 (2). pp. 382-396. ISSN 0010-0765

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