Synthesis, crystal structure and Hirshfeld surface analysis of bis[4-(2-aminoethyl)morpholine-κ² N,N′]diaquanickel(II) dichloride

Abstract

The title coordination compound, [Ni(C6H14N2O)2(H2O)2]Cl2, was synthesized by mixing 4-(2-aminoethyl)morpholine and nickel chloride in double-distilled water. The asymmetric unit comprises one half of an NiII cation (located on an inversion centre), one 4-(2-aminoethyl)morpholine ligand, one coordinated water molecule and one chloride ion outside the metal coordination sphere. The nickel ion is in a octahedral environment of the N4O2 type, coordinating four N atoms from two 4-(2-aminoethyl)morpholine ligands and two trans-located O atoms from two water molecules. The morpholine ligand was found disordered over two positions with a site occupancy ratio of 0.708 (8):0.292 (8). The crystal structure is consolidated by N—H...Cl, N—H...O, C—H...Cl and C—H...O hydrogen bonds. Hirshfeld surface analysis confirms that van der Waals interactions are prevalent in the crystal packing of the synthesized complex.

[4-(2-Aminoethyl)morpholine-κ2 N,N′]dibromidocadmium(II): synthesis, crystal structure and Hirshfeld surface analysis

“…A search in the Cambridge Structural Database (CSD, version 5.40; Groom et al, 2016) for the keyword '4-(2-aminoethyl) morpholine' yielded 21 hits for coordination compounds with metals, including trans-bis(isothiocyanato-N)bis [4-(2-aminoethyl)morpholine-� 2 -N,N 0 ]nickel(II) (NENSUU; Laskar et al, 2001) Konar et al, 2005), bis[4-(2aminoethyl)morpholine-� 2 -N,N 0 ]copper(II) bis(tetrafluoroborate) (RAPHEW; Sander et al, 2005) ,10,15,20-tetrakis-(4-methoxyphenyl) porphyrinato]iron(II) (NABXEW;Ben Haj Hassen et al, 2016;NABXEW01;Khelifa et al, 2016), (1,1,1,4,4,4-hexafluoro-2,3-bis(trifluoromethyl) Chidambaranathan et al, 2023b) and bis(acetate)-bis[4-(2-aminoethyl) morpholine-� 2 -N,N 0 ]cadmium(II) tetrahydrate (QEWKUC and FITXAL;Chidambaranathan et al, 2023c). All of these structures are consolidated by hydrogen bonding.…”

Synthesis, crystal structure and Hirshfeld surface analysis of diacetatobis[4-(2-aminoethyl)morpholine]cadmium tetrahydrate

“…search in the Cambridge Structural Database (CSD, version 5.40; Groom et al, 2016) for 4-(2-aminoethyl)morpholine yielded eleven hits for coordination compounds of 4-(2-aminoethyl)morpholine with metals, including catena-[bis(� 2dicyanamide-N,N 0 )-[4-(2-aminoethyl)morpholine]]nickel(II) (FIJROG; Konar et al, 2005), bis[2-(morpholin-4-yl)ethanamine)(5,10,15,20-tetrakis(4-methoxyphenyl)porphyrinato]iron(II) (NABXEW; Ben Haj Hassen et al, 2016; NABXEW01; Khelifa et al, 2016), trans-bis[4-(2-aminoethyl) morpholine]bis(nitrito)nickel(II) (NAVNAA; Chattopadhyay et al, 2005; RANVEJ and NAVNAA01; Brayshaw et al,2012), trans-bis(isothiocyanato-N)bis[4-(2-aminoethyl)morpholine-N,N 0 ]nickel(II) (NENSUU; Laskar et al, 2001), 4-[(2-aminoethyl)morpholine-N,N 0 ]aqua(oxalato-O,O 0 )copper(II) monohydrate (XAZRUM; Koc ´win-Giełzak & Marciniak et al, 2006), (� 2 -oxalato)bis[4-(2-aminoethyl)morpholine]dicopper(II) (YIKQAK; Mukherjee et al, 2001), dichloro-bis(2morpholine-4-yl)ethanaminecadmium(II) (ULAJEX; Suleiman Gwaram et al, 2011) and trans-diaquabis[4-(2-aminoethyl)morpholine-� 2 -N,N 0 ]nickel(II) dichloride (VEPHIL;Chidambaranathan et al, 2023). It is found that all of these structures are stabilized by hydrogen bonds.…”