𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A calorimetric study of low-spin ⇐ high-spin transitions in bis(1,10-phenanthroline-2-carbaldehyde phenyl hydrazone)iron(II) diperchlorate and ditetrafluoroborate

✍ Scribed by S.K Kulshreshtha; R.M Iyer

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
484 KB
Volume
134
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Specific beat me~u~ments for Fe(phy)*~~O~)~ and Fe(pby)*(BF~)~ are reported in the spin transition region. A maximum in C, is observed at & due to the &t-order character of the spin-state transition. The value of C,, for high-spin states is greater than that for low-spin states. The derived values of AH, AS, AC, and the effective activation energy of the spin-state transition have been used as a test of various theoretical models. For the non-interacting domain model, the average domain size has been estimated. Within the interacting binary mixture model, the values of various interaction parameters have been estimated. Based on the nucleation and growth phase transition model, approximate values of the activation barrier, the nucleation rate and the surface energy have been found. Tbe relative merits of these models are discussed.

📜 SIMILAR VOLUMES

Hyperfine interactions at a cooperative
Hyperfine interactions at a cooperative high-spin (5T2) ⇌ low-spin (1A1) Transition in dithiocyanatobis (4,7-dimethyl-1,10-phenanthroline) iron (II)
✍ E. König; G. Ritter; R. Zimmermann 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 333 KB

Hyperfine interactions have been studied at a cooperative 'T2 = ' Al transition in the solid complex Fe(4,7-(CH&-pher&(NCS)z employing an external field Helt = 40 kG and temperatures between 4.2 and 163OK (phen = l,iO-phenanthroline). At cryogenic temperatures, the isolated 'Al ground state may be

Thermally induced high-spin (5T2) ⇌ low-
Thermally induced high-spin (5T2) ⇌ low-spin (1A1) transitions in bis[2-(2-pyridylamino)—4-(2-pyridyl)thiazole]iron(II) complexes: a Mössbauer effect study
✍ E. König; G. Ritter; H.A. Goodwin 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 403 KB

Employmg snmplcs cnrichcd to >90% in 57Fc, hlbssbducr cffcct studlcs dcmonstratc that high-spin (%2) := low-spm ('A1) transitions arc responsible for the peculiar tempcraturc dcpendcncc of the mdgnctlsm in ccrtam [fc(paptH)z ] X2 l nH20 complcxcs where paptH = 2-(2-pyridyhho) -4-(2-pyrldyl)thiai!olc