STRUCTURES AND ISOMERIZATION IN DIAMMINEDICHLOROPALLADIUM(II)

Citation
Sd. Kirik et al., STRUCTURES AND ISOMERIZATION IN DIAMMINEDICHLOROPALLADIUM(II), Acta crystallographica. Section B, Structural science, 52, 1996, pp. 909-916
Citations number
15
Categorie Soggetti
Crystallography
ISSN journal
01087681
Volume
52
Year of publication
1996
Part
6
Pages
909 - 916
Database
ISI
SICI code
0108-7681(1996)52:<909:SAIID>2.0.ZU;2-L
Abstract
Three forms (cis-, trans-, beta-trans-) of [Pd(NH3)(2)Cl-2] were obtai ned as pure single-phase powder materials. Ab initio structure determi nations using X-ray powder diffraction were carried out. The cis-Pd(NH 3)(2)Cl-2 [a = 6.3121 (2), b = 6.4984 (2), c = 3.3886 (1) Angstrom, al pha = 96.604 (4), beta = 97.290 (4), gamma = 104.691(2)degrees, Z = 1, space group P1] and trans-Pd(NH3)(2)Cl-2 [a = 6.5398 (3), b = 6.8571 (4), c = 6.3573 (3) Angstrom, alpha = 103.311 (5), beta = 102.454 (3), gamma = 100.609 (4)degrees, Z = 2, space group <P(1)over bar>] phases have a typical layer-column structure, while beta-trans-Pd(NH3)(2)Cl- 2 [a = 8.1540 (2), b = 8.1482 (2), c = 7.7945 (1) Angstrom, Z = 4, spa ce group Pbca] is described as a parquet-like layer structure. Both tr ans phases demonstrate the order-disorder phenomenon. The possible way s of phase transitions are discussed. It is noted that the cis phase c an transform into trans in the solid state without destroying the crys tal body. Further transformation to beta-trans follows through a break up of the crystal body.