| | 1 | Author
| K. K. Chacko, W. Saenger | Requires cookie* | | | Title
| Crystal and Molecular Structure of l,ll-bis(Tropolone)-3,6,9-trioxaundecane * Rbl a  | | | | Abstract
| The complex between the polyether ligand l,ll-bis(tropolone)-3,6,9-trioxaundecane and Rbl crystallizes in space group P2i/c with cell dimensions a — 11.383(4), b = 14.493(5), c = 16.122(6) A and ß = 111.02(5)° with Z = 4. The structure was solved on the basis of 3734 X-ray reflections measured on a diffractometer with CuKa-radiation and refined to an R of 0.101. The polyether wraps around the Rb + in a circular structure. One of the tropolone rings is elevated in order to avoid collision. Rb + is located 1.224(6) A above the plane formed by five oxygen atoms of the ligand, it is coordinated to I -(3.666(2)Ä) and to all oxygens. The Rb+ • • • O distances of the least electronegative "ester oxygens", 3.14(1) A and 3.18(1) A are significantly longer compared to the other Rb+---0 distances in the range 2.81(1) A to 3.08(1) A. The conformation about the C-C and C-0 bonds of the ligand are gauche and trans as generally found in such molecules. The two tropolone seven-membered rings are slightly non-planar and display an envelope-type structure. | | | |
Reference
| Z. Naturforsch. 35b, 1533—1537 (1980); received August 7 1980 | | | |
Published
| 1980 | | | |
Keywords
| Polyether, Tropolone, Rbl Complex, X-ray | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/35/ZNB-1980-35b-1533.pdf | | | | Identifier
| ZNB-1980-35b-1533 | | | | Volume
| 35 | |
|
