Synthesis, structure and magnetism of a μ3-carbonato bridged nickel(II) complex with 2,2′,2″-tris(2-aminoethyl)amine ligand: a new coordination mode of carbonato bridge

Reversible Coordinative Bonds in Molecular Recognition

“…The deep blue Ni(II) complex of Tren shows an octahedral coordination sphere . Different coordination modes of a carbonate ligand are found in the 3:1 complex of Ni(II)−Tren and a μ 3 -CO 3 2- ligand, [Ni 3 (Tren) 3 (H 2 O) 2 (μ 3 -CO 3 )](ClO 4 ) 4 ·2H 2 O . Similar metal complexes were reported for Cu(II) and Zn(II) …”

Crystal structure of trans-3,4-bis(methylsulfonyloxy)pyrrolidinium chloride, [C6H14NO6S2]Cl

“…In the title compound bond lengths and angles in the oxazoline ring are comparable with those in related structures [11][12][13][14][15][16] . The interesting feature is the deviation of planar oxazoline and 2-aryl rings from coplanrity with dihedral angle 59.2(2)°.…”

“…Another interest is the potential CO 2 fixation by nickel complexes in basic solutions and the subsequent crystallization of the nickel carbonate complexes [9][10][11]. To date, only six modes of coordination by the carbonate anion have been described which involve two to three metal centers, with some of the carbonate oxygen atoms bonding to one or two metals [12][13][14][15][16]. Multinuclear cluster complexes having as much as 6metal centers are small in number [17][18][19][20][21] and the high symmetry cluster described here is, as far as we know, not precedented, where each carbonate oxygen atom bonds to adifferent nickel center.…”

“…In the assignment of the right isomer, spectral data (IR, NMR and MS) were not conclusive therefore, X-ray structure analysis was conducted on the reaction product which established the formation of the title regioisomer. Despite the extensive studies on 2-oxazoline ring, only few metal-free species have been examined by X-ray diffraction methods [11][12][13][14][15][16][17][18]. Single crystals were obtained by slow evaporation of the ethyl acetate solution.…”

Crystal structure of dodecaaqua-tetra-μ3-carbonato-hexa(N,N,N',N'- tetramethylethylenediamine)hexanickel(II) hemiheptabromide hemihydroxide, [{Ni2(C6H16N2)2(H2O)4(CO3)1.33}3][Br]3.5[OH]0.5

“…Another interest is the potential CO 2 fixation by nickel complexes in basic solutions and the subsequent crystallization of the nickel carbonate complexes [9][10][11]. To date, only six modes of coordination by the carbonate anion have been described which involve two to three metal centers, with some of the carbonate oxygen atoms bonding to one or two metals [12][13][14][15][16]. Multinuclear cluster complexes having as much as 6metal centers are small in number [17][18][19][20][21] and the high symmetry cluster described here is, as far as we know, not precedented, where each carbonate oxygen atom bonds to adifferent nickel center.…”