Bazı skandiyum (III) koordinasyon iyon ve bileşiklerinin sulu çözeltideki kararlılıkları
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Date
1997-02-17
Authors
Türkel, Naciye
Journal Title
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Publisher
Uludağ Üniversitesi
Abstract
Bu çalışmada skandiyum(III) iyonunun, çeşitli hidroliz ürünlerinin yer aldığı denge tepkimeleri potansiyometrik yöntem ile, katekol ve türevleri (CAT, 4-NCAT, DHN, TIRON, CHR, 3,4-DHBAL, 2,3-DHBA, 3,4-DHBA, 3,4-DHPA, 3,4-DHCA), salisilik asit ve türevleri (SA, 5-SSA, 5-NSA, 4-HSA, 5-HSA, 6-HSA, 1,2-HNA, 3,2-HNA) ve iminodiasetik asit türevi (DTPA, TTHA) ligandların, skandiyum(III) iyonu ile oluşturduğu koordinasyon iyon ve bileşikleri ise potansiyometrik ve spektroskopik yöntem ile t=25°C ve 1=0.1 M KN03 ve / veya KC1 iyonik ortamında araştırılmış ve çeşitli metal/ligand mol oranlarında kararlılık sabitleri belirlenmiştir. Bu araştırma ile skandiyum(III) iyonunun, katekol ve türevi ligandlar ile oluşturduğu koordinasyon iyon veya bileşiklerinin, salisilik asit ve türevi ligandlar ile oluşturduğu koordinasyon iyon veya bileşiklerinden daha kararlı olduğu gözlenmiştir. Ayrıca DTPA ve TTHA ile yapılan çalışmalardan elde edilen sonuçlara bağlı olarak, skandiyum(HI) iyonunun koordinasyon sayısının 6'dan büyük olabileceği öne sürülebilir.
In this study, equilibrium constants of various hydrolysis products of scandium(in) ions were determined by potentiometric method. Stability constants of coordination ions and compounds which are formed between scandium(in) ions and following compounds which are catechol and catechol derivatives (CAT, 4-NCAT, DHN, TIRON, CHR, 3,4- DHBAL, 2,3-DHBA, 3,4-DHBA, 3,4-DHPA, 3,4-DHCA), salicylic acid and its derivatives (SA, 5-SSA, 5-NSA, 4-HSA, 5-HSA, 6-HSA, 1,2-HNA, 3,2-HNA), and also iminodiacetic acid derivatives (DTP A, TTHA) were investigated at t=25°C in 1=0. 1M KN03 and/or KC1 ionic medium at various metal/ligand mole ratios using potentiometric and spectroscopic methods respectively. It has been found that coordination ions or compounds of scandium(IH) ions and catechol and catechol derivatives are more stable than coordination ions or compounds formed between scandium(in) ions and salicylic acid and salicylic acid derivatives. Furthermore, results obtained from the DTPA and TTHA studies suggest that coordination number of Sc(IH) ion may be bigger than six.
In this study, equilibrium constants of various hydrolysis products of scandium(in) ions were determined by potentiometric method. Stability constants of coordination ions and compounds which are formed between scandium(in) ions and following compounds which are catechol and catechol derivatives (CAT, 4-NCAT, DHN, TIRON, CHR, 3,4- DHBAL, 2,3-DHBA, 3,4-DHBA, 3,4-DHPA, 3,4-DHCA), salicylic acid and its derivatives (SA, 5-SSA, 5-NSA, 4-HSA, 5-HSA, 6-HSA, 1,2-HNA, 3,2-HNA), and also iminodiacetic acid derivatives (DTP A, TTHA) were investigated at t=25°C in 1=0. 1M KN03 and/or KC1 ionic medium at various metal/ligand mole ratios using potentiometric and spectroscopic methods respectively. It has been found that coordination ions or compounds of scandium(IH) ions and catechol and catechol derivatives are more stable than coordination ions or compounds formed between scandium(in) ions and salicylic acid and salicylic acid derivatives. Furthermore, results obtained from the DTPA and TTHA studies suggest that coordination number of Sc(IH) ion may be bigger than six.
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Keywords
Hidroliz ürünleri, Koordinasyon bileşikleri, Skandiyum, Spektroskopi, Sulu çözeltiler, İyon, Hydrolysis products, Coordination compounds, Scandium, Spectroscopy, Aqueous solutions, Ion
Citation
Türkel, N. (1997). Bazı skandiyum (III) koordinasyon iyon ve bileşiklerinin sulu çözeltideki kararlılıkları. Yayınlanmamış doktora tezi. Uludağ Üniversitesi Fen Bilimleri Enstitüsü.