Ill 



OROAXOMKTALLIC BODIES. 



ORGAXOMETALLIC BODIES. 



Antimonle trimcthyloralplutc . . 



Sulphite of tctramctbyUUbonium . 



TrletliyUttWne , 



8b^ C.H, 

 C,H, 



LSO. 

 (c.n, 



Sb { C.U, 



fC.H. 



Anllmcnlo trlctbyloxldc . . . 



Antimonic trlctbylcbloride 



lodid* of tetnetbybtibonium 



lodiUe of methylotrietbyUtibonium . 



Antimonic tiiethylosali>hato . 



Sulphate of tetraetbylostibonium 



Antimonic trletbylantiomonlte . . 



Anlimonic trictbyloxyiodide 

 Trlamylstlblne 





C.H. 





fc.n. 



f ,11, 

 C.U, 

 C.II. 



0H, 



Antuao&lc trlaiuylcblorida 



Antimonlc trUmylnltratc 



It is remarkable that we have as yet no decisive evidence of the 

 existence in this series of a compound corresponding to cacodyL It is true 

 that such a body has been described under the name of ttiobiamyl, but 

 subsequent experiments have failed to confirm its existence. Amongst 



fi: 

 organo-antiinony compounds, therefore, the most simple form is Sb < K + 



u+ 



fR+ 



bodies of this form, and of the type Sb 



R + 



R+ arc the analogues of 

 R + 

 R- 



lunmonia and its derivatives ; for a description of them, see ORGANIC 

 Btfl . 



The only bodies therefore of thU scries requiring notice here are 

 R + 

 R + 



those of the form Sb- R+ and their derivative*. When the two 

 R- 

 R- 



atoms of negative radical arc oxygen, these compounds constitute 

 what may bo termed biacid autiiuvny bases. They are formed either 



/ r R +\ 



by the direct union of the stibamines I 8b < H 4- I with oxygen, 



\ IR+/ 



(R+ 

 8b?R + 



(R+ 



fB + 

 B + 



Sb< 11 + 

 JO 



lo 



or by the decomposition of the corresponding haloid compounds by 

 means of potash, thus 



8b 



R + 

 R4- 

 R+ 

 a 



Cl 



2KO 



fR+ 



R+ 



Bb< R + 



lo 



2KC1 



The stibamines, although in other respects the perfect analogues of 

 the nitramines, here exhibit a much more highly positive character, 

 uniting with oxygen so energetically as to be spontaneously inflam- 

 mable in the lower portion of the series. 



The biacid antimony bases are colourless, transparent, amorphous, 

 and tenacious bodies, the ethylic base is easily soluble in water and 

 alcohol, but somewhat less soluble in ether. They possess a bitter 

 taste, are non-volatile, and do not suffer any change when exposed to 

 the air. Treated with potassium tlfey are reduced to stibamines. 



fat 



Sb< R+ 





 LO 



R+ 



+ 2K = 8b{R+ + ZKO 

 R+ 



Fuming nitric acid decomposes the biacid bases with ignition, but when 

 treated with dilute nitric acid, or other acid, the respective biacid salts 

 are produced. The oxysalts are soluble in water and alcohol, most of 

 them crystallise without much difficulty, as does also the biniodide, 

 but the bibromide and bichloride of the ethylic base arc liquids not 

 volatile without decomposition, insoluble in water, but soluble in 

 alcohol and ether. 



Arsenic series. This series is perhaps the most important and 

 interesting amongst organo-metallic bodies ; it contains the first dis- 

 covered organo-metal, Caoodyl, the classical investigation of which by 

 Bunseu, imparts not merely a completeness to our knowledge of this 

 series, but has afforded the clue to the successful interpretation of 

 many phenomena met with in other analogous series. It will be con- 

 venient to divide ita very numerous members into three groups : 



A. Organo-arscnical compounds of the type . A* 



(R 

 IB 



(R 



B. Organo-arscnical compounds of the type . As { R 



(R 



fR 



1 K 



C. Organo-arscnical compounds of the type i Al< X 



I u 



LR 



All arsenical compounds permit of being arranged under these three 

 types. The following arc the principal bodies already investigated : 



{u 

 JJ 



Ethylic cacotlyl A '.. 5 



\ ^** 



B. Oryano-artcnical compoundt of the type AB< R 



(c,n s 



Oxide of cacodyl As {C.H. 



(o 



(C,H, 



Chloride of cacodjl As ( C.n, 



Cl 



Chloride of cacoplatyl 

 Arf nlous dloiymclhldo 

 Ancnious dichlormcthidc . 

 Trlrnctbylanine , . 



A. C, 



Cl 



(ft TT 

 l/,M, 

 o 

 o 



As 



