If anhydrous platinum(II) bromide is suspended in chloroform and treated with o-styryldimethyl arsine (o-S), three compounds, A, B and C can be isolated. ALL compounds are monomeric and non-conducting in nitro- benzene. Formulae and infrared data are tabulated below: CH=CH2 Üc=c/ cm-1 o-S 1630 As (CH3)2 A PtBr,(o-S), 1630 B PtBr,(o-S)2 1627 C PtBr, Co-S) 1488 Addition of an excess of bromine to A or B gave an orange complex, D, PtBr, (o-S), in which the bands at 1630/1627 cm- were absent, but new bands had appeared at 594 and 572 cm-. Suggest structures for A, B, C, and D.

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PROBLEM 8
If anhydrous platinum(II) bromide is suspended in
chloroform and treated with o-styryldimethyl arsine
(o-S), three compounds, A, B and C can be isolated. ALL
compounds are monomeric and non-conducting in nitro-
benzene. Formulae and infrared data are tabulated below:
CH=CH2
Vc=c/ cm-1
o-S
1630
As (CH3)2
PtBr, (o-S)2
1630
A
PtBr, (o-S)2
1627
B
C
PtBr, (o-S)
1488
Addition of an excess of bromine to A or B gave an
orange complex, D, PtBr, (o-S), in which the bands at
1630/1627 cm- were absent, but new bands had appeared
at 594 and 572 cm-. Suggest structures for A, B, C,
and D.
Transcribed Image Text:20 PROBLEM 8 If anhydrous platinum(II) bromide is suspended in chloroform and treated with o-styryldimethyl arsine (o-S), three compounds, A, B and C can be isolated. ALL compounds are monomeric and non-conducting in nitro- benzene. Formulae and infrared data are tabulated below: CH=CH2 Vc=c/ cm-1 o-S 1630 As (CH3)2 PtBr, (o-S)2 1630 A PtBr, (o-S)2 1627 B C PtBr, (o-S) 1488 Addition of an excess of bromine to A or B gave an orange complex, D, PtBr, (o-S), in which the bands at 1630/1627 cm- were absent, but new bands had appeared at 594 and 572 cm-. Suggest structures for A, B, C, and D.
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