Aerobic Oxidation of Primary Aliphatic Alcohols to Aldehydes
deuturated and protonated substrates. Peaks were quantified
by comparing molecular peak intensities of the starting ma-
terials and the oxidized products.
Experimental Section
Catalyst Preparation
The quaternary ammonium salt of the polyoxometalate,
12A
was prepared by dropwise addition of 1 mmol of the
parent polyoxometalate, Na12A{[WZn3A(H2O)2]
[(ZnW9O34)2]}·46H2O,[15] dissolved in 10 mL H2O to
12 mmol of C16H33A
(CH3)3N+ClÀ (25% aqueous solution).
The precipitate formed was separated by centrifugation, fil-
tered off and dried overnight under vacuum at 808C. Ther-
mogravimetric analysis showed no water was present. Ele-
mental analysis found (calculated) %: C 33.02 (32.76), H
6.24 (6.03), N 1.98 (2.01).
(CH3)3N+,
Q CHTUNGTRENNUNG{[WZn3ACHTUNGTRENNUNG(H2O)2]ACHTUNGTRENNUNG[(ZnW9O34)2]} where Q=C16H33ACHTNUGTRENNGUN
Acknowledgements
C
CHTUNGTRENNUNG
ACHTUNGTRENNUNG
The research was supported by the German-Israeli Project
Cooperation (DIP-G7.1), the Israel Science Foundation, the
US-Israel Binational Science Foundation, the Kimmel Center
for Molecular Design and the Bernice and Roger Cohn
Center for Catalysis. R. N. is the Rebecca and Israel Sieff
Professor of Organic Chemistry
CTHUNGTRENNUNG
The Pd(II)-supported polyoxometalate catalyst was pre-
pared by dropwise addition of 0.167 g (0.5 mmol) of
PdACHTUNGTRENNUNG[(CH3)2SO]2Cl2 dissolved in 4 mL of CH2Cl2 to a solu-
[20]
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12CATHNUGTRNE{UNNG [WZn3ACHNUTRGTEG(NNUN H2O)2]ACHTNUGTERN[NGUN (ZnW9O34)2]}
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U
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