Darstellung und Struktur der Komplexverbindungen trans‐[CoIII(py)4F2][H2F3] und [Pd(py)4]F2 · 1,5 HF · 2 H2O |
| |
Authors: | J Holzbock W Sawodny U Thewalt |
| |
Abstract: | Synthesis and Crystal Structures of the Complexes trans ‐CoIII(py)4F2]H2F3] and Pd(py)4]F2 · 1.5 HF · 2 H2O The cobalt complex trans‐Co(III)(py)4F2]H2F3] ( 1 ) has been prepared by electrochemical oxidation of CoF2 in a pyridine/HF mixture and the palladium complex Pd(py)4]F2 · 1.5 HF · 2 H2O ( 2 ) has been obtained via halogen exchange between Pd(py)2Cl2 and AgF2 in pyridine. 1 and 2 crystallize in the space group C2/c with a = 27.928(14), b = 9.019(3), c = 18.335(8) Å, β = 113.41(3)° for 1 and a = 28.183(9), b = 9.399(3), c = 17.397(6) Å, β = 104.66(3)° for 2 , respectively. Concerning the shape and location of the M(py)4 fragments 1 and 2 are isostructural. The metal atoms occupy special positions in their unit cells with the result that four complex atoms have C2 symmetry and four complex cations have Ci symmetry giving a total of Z = 8. In 1 two F– ions complete an octahedral coordination around the Co atoms (Co–F 1.820(2) to 1.834(3) Å). In 2 the shortest Pd–F distance is 3.031(2) Å. This precludes the existence of Pd–F bonds. In 1 one can identify H2F3– groups. In 2 there are larger aggregates, consisting of F–, HF, and H2O subunits, connected by H‐bridges. In spite of these differences, both complexes belong to the same type of structure, which may be of a common type Mx+(py)4Fx · y HF · z H2O. |
| |
Keywords: | Cobalt Palladium Fluoro complexes Crystal structures |
|
|