Quaternary ammonium enolates as synthetic intermediates

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Table I. " 0 Spectral Data for Polyoxomolybdates No. of pulses

Compounda

Solvent, Temp, OC

[ M o ] , ~M

1 Na6TeM06024-2H20 2 Na6M0702~4H2O

H 2 0 (pH 5 . 8 ) , 82 H2O (pH 5.5), 25

8.6 5.8

4 465 9 061

H 2 0 (pH 5.5), 25

2.8

12 844

H20

H2O (pH 5), 95 (pH 4.1), 25

4.7 1.9

1 1 021 16 384

-807 (15), -383 (15), -180 (40) -821 (60), -758 (18), -400 (25), -338 (20). -123 (15) -814 (40), -757 (14), -395 (18), -335 (IS), -123 (11) -825 (6), -385 (8), -256 (50) -831 (20), -376 (20)

H2O (pH 2.6), 93

1.2

I O 320

-838 (6), -382 (8)

(CH&NCHO, 25

1.4

5 729

CH$N,

75

0.2

131 072

CH&N, 79

0.3

18 701

-939 (4), -586 ( 5 ) , -554 (7)

CH3CN, 25

0.1

131 072

-939 (6), -584 (8), -553 (1 5)

3 4

NadM0602~3HzO Na&AlM0602~4H20 5 Na3H6CoM060248H2O 6 [(n-C4H9)4N]2Mo-

Chemical shifts (line widths)c

-927 ( I O ) , -559 (4), +32 (