Abstract
The cyclocondensation of pyrrole-2,5-dicarbaldehyde and the amines N,N-bis(2-aminoethyl)- and N,N-bis(3-aminopropyl)-2-(aminomethyl)pyridine in the presence of Ag(I) nitrate yielded homodinuclear bibracchial tetraimine Schiff base macrocyclic complexes [Ag2(L3)] (1) and [Ag2(H2L4)(ClO4)2]·MeCN (2). In 1 the Ag···Ag sepn. is 2.748 Å. In 2 the Ag atoms Ag(1) and Ag(2) are disordered over two sites with refined occupancies of 94.12 and 97.22% resp. They are three-coordinate in the mol. having higher Ag site occupancy and four-coordinate in that mol. having lower occupancy; the Ag···Ag sepns. are 5.881 and 7.224 Å resp. There are protonated imine N atoms present in both mols. and the structure contains a disordered MeCN of crystn. [on SciFinder(R)]
| Original language | English |
|---|---|
| Pages (from-to) | 2031-2038 |
| Number of pages | 8 |
| Journal | J. Chem. Soc., Dalton Trans. |
| Issue number | 12 |
| Publication status | Published - 1999 |
Keywords
- crystal structure disilver bibracchial Schiff macrocycle
- structure silver bibracchial Schiff macrocycle dinuclear
- silver bibracchial Schiff macrocycle dinuclear prepn
- isomer silver pyrroledicarbaldehyde bisaminopropylaminomethylpyridine Schiff macrocycle