A spectrophotometric study of cobalt(II), nickel(II) and copper(II) thiocya
nato complexes was carried out in methanol at 25 degrees C and at a constan
t ionic strength of 1 M. Under the experimental conditions, two mononuclear
complexes are identified with each of the three metal ions. Their stabilit
y constants are determined with a recent PC program SIRKO and the calculate
d values are: for cobalt, log beta(1) = 1.6, log beta(2) = 2.7; for nickel,
log beta(1) = 1.8, log beta(2) = 3.0; and for copper, log beta(1) = 3.0, l
og beta(2) = 3.6. (C) 1999 Elsevier Science Inc. All rights reserved.