Please use this identifier to cite or link to this item:
doi:10.22028/D291-22518
Title: | Synthesis and structure of metallated macrocycle-bearing cyclophophazenes. - Part I : The (Li, Mg, Zn)/SPIR0(30203) derivatives |
Author(s): | Veith, Michael Kross, M. Labarre, J. F. |
Language: | English |
Year of Publication: | 1991 |
OPUS Source: | Journal of molecular structure. - 243. 1991, 3/4, S. 189-209 |
SWD key words: | Verallgemeinerte Ableitung Molekülstruktur Lithium Magnesium |
DDC notations: | 540 Chemistry |
Publikation type: | Journal Article |
Abstract: | Syntheses and molecular structures of three metallated (Li, Zn, Mg) derivatives of the macrocycle-bearing cyclophosphazene N3P3Cl4 [HN---(CH2)3---O---(CH2)2---O---(CH2)3---NH] (coded as SPIRO 30203, 1) are reported. These three molecular structures reveal three different patterns of metal coordination. In compound 2 one of the two hydrogen atoms in SPIRO 3O2O3 is substituted by lithium generating a dimeric structure with pentacoordinated lithium centers. This structure is further stabilized by N---H hydrogen bonds. In 3 both hydrogen atoms of the macrocyclic loop are replaced by two zinc atoms through a cross-link metallation leading again to a dimeric molecule. In this compound the Zn atom is found to be in a trigonal bipyramidal environment with one very long N---Zn interaction. The origin of the dimerization of the magnesium compound 4 is analogous to 3. Magnesium is in the center of a distorted octahedron, coordinated with the O- and N-donors of the macrocyclic loop and also one nitrogen atom of the N3P3 ring. 4 is the first example of a metallic center coordinated by a neutral phosphazene ligand. Typical metal-N and metal-O distances are (in Å): Li-O, 2.05—2.07; Li-N, 2.07—2.36; Zn-O, 2.08—2.14; Zn---N, 1.94—1.95 (2.49); Mg---O, 2.09—2.14; Mg---N, 2.07—2.31. |
Link to this record: | urn:nbn:de:bsz:291-scidok-18203 hdl:20.500.11880/22574 http://dx.doi.org/10.22028/D291-22518 |
Date of registration: | 5-Dec-2008 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Chemie SE - INM Leibniz-Institut für Neue Materialien |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes INM |
Files for this record:
File | Description | Size | Format | |
---|---|---|---|---|
ve199106.pdf | 1,24 MB | Adobe PDF | View/Open |
Items in SciDok are protected by copyright, with all rights reserved, unless otherwise indicated.