Polarized Emission Studies and Crystal Data of KLi[Pt(CN)4] · 2H2O
- 1 February 1978
- journal article
- research article
- Published by Wiley in Berichte der Bunsengesellschaft für physikalische Chemie
- Vol. 82 (2) , 207-212
- https://doi.org/10.1002/bbpc.197800012
Abstract
Polarized emission of KLi[Pt(CN)4] · 2H2O (KLiCP) single crystals was monitored in the temperature range from 295 to 5 K and compared with the polarized emission of several other tetracyanoplatinates(II) with columnar structures of in‐chain Pt‐Pt‐distances between R = 3.15 and R = 3.67 Å. A correlation between the energetic position of the emission maxima and the Pt‐Pt‐distance of adjacent molecules in the column is used to predict R for KLiCP by use of spectroscopic data. The in‐chain Pt‐Pt‐distance found by this method is (3.20 ± 0.01) Å. — X‐ray diffraction measurements yield, that KLi[Pt(CN)4] · 2H2O crystals are orthorhombic with lattice constants a = 10.296(2) Å, b = 14.390(3) Å, c = 6.399(2) Å. The probable space group is C92v — P21 cn. The observed density is D0 = 2.64(3) g/cm3 and the calculated one Dx = 2.671(2) g/cm3 for 4 formula units per unit cell. X‐ray powder data are given. The [Pt(CN)4]2−‐complexes lie in columns along [001]. The groups are separated by c/2 ≡ R = (3.200 ± 0.002) Å, which agrees with the spectroscopic prediction and confirms the former correlation.Keywords
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