Spectrophotometric study of the reaction of nickel(II) with 4-(2-pyridylazo)-resorcinol in alkaline media

✍ Scribed by D Nonova; B Evimova

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 382 KB
• Volume: 49
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(01)80013-1

✦ Synopsis

Sl'EC-~I~OI'HOI'O~l~-~I~IC STUDY 01: THE Rl5\CTION 01; NlClCl~L(II) WI-I-H 4-(z-1'YII1DYLAZO)-RESORCISOL IIU AI,ICALINE JlEDI.4 ht pir 5 nickcl( I I) forms \vitli j-(z-I'~ridvIa;so)-rcsorcinol (PAR) a rctl coml~lcs witli ii metal: ligancl molar ratio of I : 21-3. In ortlcr to incrcasc tlie liniitcd solul)ilit~ of tllc con~l~l~,x, the reaction must Ix carriccl out in prcscnce ol rln organic solvent. Cxhwsel al.4 reported tliat at piL S-0 tllc al~sc~rl~nncc spectrum of the nickcl(II)-PAR complcs sliows a ycnk at qp 11131. 'I'llis complex was found, by Job's rnctllod, to Iixvc a mctal/lig:~~~d r;Llil.) of I : 3. 'fllc s;inic autliors sIlowet tli;it nickcl(1 I) Iwl~aves nnonialousl~~ \vlicn tlic formatioti curve of tlic cotn1)lc.x witli PAR was 0l)taincd I)), lwtcntiomctric titration". SHIJO AsI> 'rhI<IcuCHl~ ll;~vc dctcrmincd nickcl( II) sl~cctrol~liotc~n~~tric;~lly wit11 PAR at pH 9.3 and 49-j nm. 'I'l~c variation in the alworhncc of tlic nickcl(II)--1"1\1~ conll)lcs witlr pit Ilas