ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Annular compounds containing two PAuP-entities are prepared by reaction of (trialkylphosphine)gold (I) halogenides with diphosphines. With bis (dimethyl-phosphino)methane (DMPM), 1,2-bis(dimethylphosphino)ethane (DMPE) and 1,3-bis(dimethylphosphino)propane (DMPP) we obtained the following 8-, 10-and 12-membered annular binuclear complexes: [Au(DMPM)]2Cl2 H2O, [Au(DMPM)]2(SbF6)2, [Au(DMPE)]2Cl2 2H2O, [Au(DMPE)]2(SbF6)2, [Au-(DMPP)]2Cl2 and [Au(DMPP)]2(SbF6)2 as identified by conductivity measurements, 1H- and 31P-NMR. spectra and extinction curves. Their absorption spectra differ from those of the isolated linear PAuP-complexes mainly by a very strong band at low energy which is absent in the latter. There is a strong interaction between the PAuP-entities only in certain excited electronic states and an understanding of all transitions is only possible, if both chromophores PAuP and (PAuP)2 are taken as a basis of interpretation. Bands of the same spectrum belong apparently to two different electronic systems.The absorption spectra of isolated linear and annular ylide-complexes containing one and two CAuC-entities, respectively, show quite the same behaviour.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19820650326
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