C 28 H 54 Cl 2 Cu 2 N 4 O 28 S 2 ,triclinic, P 1 (no. 2), a =8.6496(6) Å, b =9.6240(7) Å, c =13.7224(9) Å, a =100.865(5)°, b =100.956(5)°, g =93.997(6)°, V =1094.8 Å 3 , Z =1,
Source of materialThe solution of ethanolamine in 5mlwater was added slowly to 20 ml aqueoussolution of 5mmol sodium 3-formyl-4-hydroxy-5-morpholinomethyl-benzenesulfonate. After stirring vigorously for 30 min, 10 mmol Cu(ClO 4 ) 2 ·6H 2 Owas addedtothe resulting Schiff base. The mixture was refluxed for 1hand cooled to room temperature.Atfirst green square plate-shapedcrystals were isolatedf rom the precipitate, and then green needle-like crystals were obtained after aweek by slowly evaporation of the solution at room temperature [1][2][3][4].
Experimental detailsThe positionso ft he Hatoms of the disordered hydrate water could not be analyzed.
DiscussionThe crystal structure of the title compound consists of three fundamental units: metal complex cations, ClO 4 -anions and lattice water. Inthe complex, the hydrogen atom from phenol hydroxyl moved on to the nitrogeninthe morpholine. Therefore, the phenol hydroxyl unit converts to the anion part with asingle negative charge and the nitrogen combining ahydrogen atom converts to an ammonio unit with asingle positive charge. The protonation of oxygen or nitrogen by lattice water or ethanolamine did not take place. Inthe dinuclear complex cation, Cuiscoordinated by three oxygen atoms and anitrogen atom, among which two oxygen atoms (O4, O5) and one nitrogen (N1) come from Schiffbase ligand, one oxygen atom (O7) is from the coordinated water. The bond lengths Cu1-O4, Cu1-N1, Cu1-O7a nd Cu1-O5a re 1.878(3) Å,1.933(4) Å,1.980(3) Åand 2.007(3) Å,respectively. Int he ClO 4 -anion, the refined distances Cl1-O8, Cl1-O10, Cl1-O9and Cl1-O11 are 1.309(8) Å,1.319(9) Å,1.386(7) Å and 1.428(10) Å,respectively. There are weak and strong hydrogen bonds in the complex. The intramolecular hydrogen bonds include C5-H5···O3a nd C10-H10A···O4. The intermolecular hydrogen bonds include C10-H10B···O2and N2-H2C···O1. Oxygen O5l inks the ligand and the lattice water O13 via C13-H13B···O5and O5-H5C···O13 bonds. Except coordinated by Cu1, the coordinated O7water forms strong hydrogen bonds via O7-H7B···O6and O7-H7C···O16 (O16 from hydrate water), which is indicatedbythe hydrogen bond lengths of 2.03 Åand 1.86 Å,r espectively. The C5-H5···O8b ond length of 2.59 Å shows that therei sw eak hydrogen bond between anion and ligand.