The preparation of silver fluoroborate: a warning

Tetrahedron Letters in Great Britain.

No. 21,

pp.

775-776,

1961.

Pergamon Press

Ltd.

Printed

THE PREPARATIONOF SILVER FLUOROBORATE: A WARNING D.M Department

Lemal and A.J.

of Chemistry, Madison, (Received

IN connection Neerweinl silver

with

oxide

the residue

and boron containing

removed by filtration washed with water this

interval

solid

so it

terrific

could

contained

1

0

in nitromethane,

and unreacted glass

to stand

funnel. for

Without

silver This

several

oxide

was then

At the

to

loosen

the residue

of and

dark residue

days.

swirled

warning

A mixture

violence.

was heated

was added and the funnel

that

This

treatment

A silver mixture

the solid

fulminate.

nitromethane

fulminate.2 reaction

a sintered

be discarded.

with which

silver

observation of

metaborate

by the method of

was end of

the

detonated

with

brisance.

The ease

salt

of great

etherate

and then allowed

more water

fluoroborate

an explosion

silver

of Wisconsin

Wisconsin

of silver

trifllloride

using

University

6 November 1961)

a preparation

we hdve experienced

Fry

with

of

conjecture

an ice-cold

mercuric

analog

containing

detonated

of both

H. Meerwein, V. Hederich, 541 (1958).

L N.V. Sidgwick, 7he University Press (1937). bringing this reference

is

causes

and silver

Be are indebted to our attention. 775

might have by Nef’s

of the sodium

precipitation is

and K. Wunderlich,

it

supported

solution

transformation

nitromethane

that

strongly

aqueous

chloride

this

suggested

of mercuric

not unlikely

in a

oxide.

Arch.Pharm.

a,

541

p. 339. Oxford to Mr. R. Lawton for

776

The preparation

We strongly which

employs 0 ’ G.A.

recommend

a.:gentous

Olah

and

Olah’s

fluoride

H.W. Quinn,

of

silver

method instead

fluoroborate

for of

preparing

No.21

silver

fluoroborate,

the oxide. 3

J.Inors.Nucl.Chem.

&

295

(1960).