SO3--CN-CH3NH-gH loN-Solvent Water Methanol Ethanol Dime t h yl formami de Acetone Ethanol Water Chloroform Dimethyl sulphoxide Acetonitrile A, (mt-4 450 425 424 465 464 464 462 437 452 444 A2 (mI-4 475 (sh) 495 497 570 572 565 525

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Solid complexes of the type [MeHg(NucH2)]N03, [MeHg(NucH)], and [(MeHg),(NucH)]NO, (NucH2 = guanosine or inosine) have been prepared by the reaction of the nucleosides and MeHgNO, in aqueous solution at the appropriate pH and mole ratios of constituents. In addition, a 3:l MeHg-inosine complex, [(MeHg),(Ino)]NO,, involving C8 bonding has been prepared under relatively mild conditions in aqueous solution. The complexes have been characterized by their 'H and "C NMR spectra in (CD3)2S0 and also by IR spectroscopy. Possible implications for the mutagenic action of organomercurials, particularly MeHg", are noted.

Picrylchloride reacts rapidly with methoxide ion in methanol to form a o-complexcontainingmethoxide ion attached to the C-3 position of the picryl chloride. Thermodynamic and kinetic parameterscharacterizing this reaction are presented and compared with corresponding parameters for the analogous reaction of methoxide ion and 2,4,6-trinitroanisole in methanol. Details concerning the much slower formation of the o-complex containing methoxide ion added to the C-l position of picryl chlorideare also presented.Le chlorure de picryle rtagit rapidement avec I'ion mtthoxyde dans le methanol pour conduire a un complexe-o contenant l'ion mtthoxyde relit a la position C-3 du chlorure de picryle. O n presente les parametres thermodynamiques et cinetiques caracttrisant cette rtaction et on les compare avec ceux de la rtaction analogue de l'ion mithoxyde avec le trinitro-2,4,6 anisole dans le mtthanol. On presente aussi les details se rattachant a la formation beaucoup plus lente du complexe-o qui contient I'ion mithoxyde relit a la position C-1 du chlorure de picryle.[Traduit p a r le journal] Can. J. Chem., 52, 18 (1974) IntroductionThe substitution of chloride ion in picryl chloride by hydroxide or alkoxide ion is postulated to involve the intermediate o-complex l(1). There are questions, however, concerning the relative stability of this o-complex and whether the initial color observed in these systems is due to 1 or the presence of small amounts of the isomeric o-complex 2 (2, 3).