Synthesis and Reactivity of Alkyl, Hydride, and Silyl Derivatives of the (Terphenyl)imido Fragments Cp*(ArMesN)Ta (Cp* = η5-C5Me5; ArMes= 2,6-(2,4,6-Me3C6H2)2C6H3) and Cp*(ArTripN)Ta (ArTrip= 2,6-(2,4,6-iPr3C6H2)2C6H3)

2004 ◽  
Vol 23 (1) ◽  
pp. 31-43 ◽  
Author(s):  
John Gavenonis ◽  
T. Don Tilley
Keyword(s):  
Silyl Derivatives ◽  
Derivatives Of ◽  
Alkyl Hydride

Phase transfer catalytic synthesis of silyl derivatives of heterocyclic thiols

1999 ◽  
Vol 35 (9) ◽  
pp. 1052-1058 ◽  
Author(s):  
E. Abele ◽  
K. Rubina ◽  
R. Abele ◽  
I. Sleiksha ◽  
E. Lukevics
Keyword(s):  
Phase Transfer ◽  
Catalytic Synthesis ◽  
Silyl Derivatives ◽  
Derivatives Of

A general method for the preparation of silyl derivatives of platinum(II)

1967 ◽  
pp. 869 ◽  
Author(s):  
J. Chatt ◽  
C. Eaborn ◽  
S. Ibekwe ◽  
P. N. Kapoor
Keyword(s):  
Silyl Derivatives ◽  
Derivatives Of ◽  
General Method

29Si-Kernresonanzuntersuchungen an N-Trimethylsilyl-substituierten Aminen und Amiden / 29Si Nuclear Magnetic Resonance Studies on N-Trimethylsilyl Derivatives of Amines and Amides

1977 ◽  
Vol 32 (2) ◽  
pp. 163-166 ◽  
Author(s):  
B. Heinz ◽  
H. C. Marsmann ◽  
U. Niemann
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Aromatic Amines ◽  
Chemical Shifts ◽  
Substituent Effects ◽  
Electronic Charge ◽  
Magnetic Resonance Studies ◽  
Basic Character ◽  
Silyl Derivatives ◽  
Trimethylsilyl Derivatives ◽  
Derivatives Of

The 29Si chemical shifts of several trimethyl silyl derivatives of amines and amides are measured and compared to other chemical and theoretical properties such as the basicities or the electronic charge on the nitrogen or the hydrogen of the N-H group of the amine or the amide. Whereas the 29Si chemical shift of saturated amines can be rationalized in terms of substituent effects, the shifts of aromatic amines show some dependency on the basic character of the amine. There seems to be little correlation between 29Si chemical shifts and electronic charge, but there is a similarity of 29Si with 1H chemical shifts of the NH group, which is interpreted as depending on anisotropy effects.

Silyl Derivatives of the Mixed Sandwiches Cyclopentadienyl Manganese Benzene and Cyclopentadienyl Manganese Biphenyl, CpMn(C6H6) and CpMn(C6H5-Ph)

1997 ◽  
Vol 52 (9) ◽  
pp. 1037-1042 ◽  
Author(s):  
Max Herberhold ◽  
Thomas Hofmann ◽  
Stefanie Weinberger ◽  
Bernd Wrackmeyer
Keyword(s):  
Nmr Spectroscopy ◽  
Membered Ring ◽  
Grignard Reagents ◽  
Sandwich Complexes ◽  
Subsequent Reaction ◽  
Silyl Derivatives ◽  
Magnesium Halide ◽  
Derivatives Of

Mixed manganese sandwich complexes containing a silyl-substituted cyclopentadienyl ring, e. g. (η5 - C5H4 - R)Mn(η6- C6H6) (3a - c) and (η5- C5H4 - R)Mn(η6- C6H5 - Ph) (4a - c); (R = SiMe3 (a), Si2Me5 (b) and SiMe2tBu (c)), were obtained in low yield via intermediates {(η5 - C5H4 - R)MnCl} and their reaction with phenyl Grignard reagents. Use of the 4-trimethylsilyl-phenyl magnesium halide in the reaction with the intermediate {CpMnCl} led to complexes with silylsubstituted arene rings, CpMn(η6 - C6H5 - R′) (5a) and CpMn(η6 -R′ - C6H5 - C6H5 - R′) (6a); (R′ = SiMe3 (a)). Dilithiation of CpMn6H6) (1) and subsequent reaction with a chlorosilane gave (η5-C5H4 - R)Mn(η6 - C6H5 - R′) (7a,b); (R = R′ = SiMe3 (a), Si2Me5 (b)). A cyclophane 8 in which five- and six-membered ring are linked through a -Me2Si-SiMe2- bridge was obtained using 1,2-dichloro-tetramethyldisilane. The mixed manganese sandw ich complexes were thoroughly characterized by 1H , 13C, 29Si and 55Mn NMR spectroscopy. The 55Mn spectra can be used to detect low-yield side-products.

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