Bis (salicylidene) ethylenediamine

Structural formula
General
Surname	Bis (salicylidene) ethylenediamine
other names	N , N ′ -disalicylethylenediamine; H 2 salen;
Molecular formula	C 16 H 16 N 2 O 2
Brief description	pale yellow, glowy solid
External identifiers / databases
EC number	202-376-3
ECHA InfoCard	100.002.161
PubChem	26518
Wikidata	Q3042079
properties
Molar mass	268.32 g · mol -1
Physical state	firmly
Melting point	127-128 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
Toxicological data	100 mg kg −1 ( LD 50 , mouse , intraperitoneal )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Bis (salicylid) ethylenediamine (H ₂ -Salen) is a chemical compound which, after deprotonation of the two OH functions, is used as a chelating ligand ( Salen ) in coordination chemistry and homogeneous catalysis .

Manufacturing

Bis (salicylidene) ethylenediamine can be prepared by reacting salicylaldehyde and ethylenediamine in ethanol .

It is a light yellow, micaceous solid that dissolves in polar organic solvents .

P. Pfeiffer, E. Breith, E. Lübbe, T. Tsumaki: Tricyclic orthocondensed secondary valence rings . In: Justus Liebig's Annals of Chemistry . tape 503 , no. 1 , 1933, pp. 84-130 , doi : 10.1002 / jlac.19335030106 .
Harvey Diehl, Clifford C. Hach, John C. Bailar: Bis (N, N'-Disalicylalethylenediamine) -μ-Aquodicobalt (II) . In: Ludwig F. Audrieth (Ed.): Inorganic Syntheses . tape 3 . John Wiley & Sons, Inc., 1950, ISBN 978-0-470-13234-0 , pp. 196-201 , doi : 10.1002 / 9780470132340.ch53 .