ISSN:
0009-2940
Keywords:
Ruthenium complexes
;
Sulfur dioxide complexes
;
Sulfene complexes
;
Nucleophilic addition
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Sulfur(IV) Compounds as Ligands, 19[1]. - Cationic Ruthenium-Sulfene Complexes: Synthesis and Reactions. Crystal Structure Analysis of [Cp*(Me3P)2Ru(CH2=SO2)]PF6Methylene addition to coordinated sulfur dioxide yields the novel η2(C, S) sulfene complexes [Cp(dppm)Ru(CHR=SO2)]PF6 (R=H:3, Me: 4) and [Cp*(Me3P)2Ru(CH2=SO2)]PF6 (5). An X-ray structure determination of 5 reveals a relatively short C - S bond (167.5 pm). The sulfene complexes are powerful carbon electrophiles as shown by the rapid addition of halides, pseudohalides, amines, including „nonnucleophiles“ such as ethyldiisopropylamine and DBU, and phosphanes to 3. The regioselectivity of the reaction of 3 with enamines is opposite to that of free sulfene, i.e. coordination of the sulfene to ruthenium effects umpolung.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260319
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