Polarized crystal spectra of potassium tetrachloropalladate(II) and potassium tetrabromopalladate(II)

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50152a051· OSTI ID:7358742

Rush, R M; Martin, Jr, D S; LeGrand, R G

Absorption spectra have been recorded for aqueous solutions and single crystals of K/sub 2/PdCl/sub 4/ and K/sub 2/PdBr/sub 4/. For both compounds /sup 1/A/sub 2g/ and /sup 1/E/sub g/ peaks are not resolved in a polarization although the /sup 1/A/sub 2g/ peak has the much stronger vibrational structure at 15/sup 0/K. For K/sub 2/PdCl/sub 4/ the /sup 1/A/sub 2g/ and /sup 1/E/sub g/ states are assigned at 21,700 and 23,200 cm/sup -1/, respectively, and for K/sub 2/PdBr/sub 4/ they are at 20,200 and 21,700 cm/sup -1/. The /sup 1/A/sub 2u/ reverse arrow /sup 1/A/sub 1g/ (M reverse arrow L..pi..) charge-transfer bands have surprisingly low intensity and are observed at 37,400 and 30,900 cm/sup -1/ for K/sub 2/PdCl/sub 4/ and K/sub 2/PdBr/sub 4/. The /sup 1/B/sub 1g/ transition appears to be hidden by the /sup 1/A/sub 2u/ transition in the c polarization. Weak spin-forbidden bands were observed in both polarizations for both compounds. For K/sub 2/PdBr/sub 4/ exceptional vibrational structure has been recorded at 15/sup 0/K. Also, in K/sub 2/PdBr/sub 4/ two weak transitions at 37,000 and 43,200 cm/sup -1/ have been assigned as forbidden charge-transfer transitions. (auth)

• Research Organization: Ames Lab., IA
• OSTI ID: 7358742
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 14:10; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
BROMIDES
BROMINE COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
CRYSTALS
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
MONOCRYSTALS
PALLADIUM COMPOUNDS
POTASSIUM COMPOUNDS
SOLUTIONS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE