Fluoromethyl isocyanide and difluoromethyl isocyanide

P81

331

FLUOROMETHYL

Dagmar

ISOCYANIDE

Preuaschat

AND DIFLUOROMETHYL

and Dieter

ISOCYANIDE

Lentz

Institut fiir Anorganische und Analytische Chemie der Freien Universitlt Berlin, Fabeckstr. 34 - 36, D-1000 Berlin 33, FRG

Whereas

methyl

years,

the chemistry

been developed Herein

isocyanide

chromium

Both

the syntheses

compounds

more

CN-CHzF

derivative

compounds

of the missing and CN-CHFz

than a hundred

differ

CNCF3,

has

drastically.

partially

via their pentacarbonyl

complexes.

(CO)sCr(CN-CHClz

- (CO)sCr(CN-CHFz)

1 + HgFz

(CO)JC~(CN-CC~ZF)

Attempts

since

of its perfluorinated

only recently.

we report

fluorinated

is known

to obtain

+ 2 RaSnH

the free

-

(CO)aCr(CN-CHzF)

isocyanides

will

+ HgClz

+ 2 R3SnCl

be described.