Crystal structure of bis(μ-4,4′-bipyridyl-N,N′)-tetrakis(cyanoaceto)- dimanganese(II) tetrahydrate, Mn2(C3H2NO2)4(C10H8N2)2 · 4H2O

Abstract

C 32 H 32 Mn 2 N 8 O 12 ,orthorhombic, Pccn (no. 56), a =13.028(2) Å, b =19.081(3) Å, c =7. Source of materialMn(CH 3 COO) 2 · 4H 2 O(0.123 g, 0.5 mmol) and 4,4'-bipyridine (0.96 g, 0.5 mmol) were refluxed in anhydrous methanol (10 ml) for 50 min, then, cyanoacetic acid (0.88 g, 1mmol) was added. The pH value was adjusted to 3with 0.5 MCH 3 COOH solution. The mixture was further stirred for 2h,then filtered. The resulting clear solution was diffused with diethyl ether vapor at room temperature for two weeks. Dark green crystals were obtained, collected by filtration and dried in air (yield, 0.156 g, 37 %). Elemental analysis -found: C, 46.48 %; H, 34.59 %; N, 13.46.%; calculated for C32H32N8O12Mn2:C ,4 6.27 %; H, 34.88.%; N, 13.49 %. IR data are available in the CIF. Experimental detailsThe positions of the water hydrogen atoms were found from Fourier difference synthesis and refined isotropically. The remaining hydrogen atoms were generated theoretically, and included as fixed contributions without futher refinement.

Crystal structure of tetra(4,4′-dipyridyl sulfide-N)-di(Nisothiocyanato) mangnese(II), Mn(NCS)2(C10H8N2S)4

“…As to the the other ring C6/C7/C8/C9/C10/N2, all the atoms are almost strictly planar with the average and the maximum deviation from pyridine ring are 0.011 Å and −0.019 Å of C8, respectively. In the molecule of 4,4'-bipyridyl sulfide, the dihedral angle between two pyridine rings is 122.2°,and this is comparable with the assembly in the other complex containing 4,4'-dipyridne [13]. …”

A Series of Cyanoacetato Copper(II) Coordination Polymers with Various N,N′-Ditopic Spacers: Structural Diversity, Supramolecular Robustness, and Magnetic Properties

“…The two pyridine rings of bipyridyl moieties are not coplanar with the dihedral angle between the two planar pyridine rings of 24.15°. The structure of 2 is isomorphous with previously reported Mn II complex, [Mn­(cna) 2 (bpy)­(H 2 O) 2 ] n . However, the overall packing motif has not been entirely investigated.…”

“…The structure of 2 is isomorphous with previously reported Mn II complex, [Mn(cna) 2 (bpy)(H 2 O) 2 ] n . 23 However, the overall packing motif has not been entirely investigated. Each 1D chain of 2 is interlaced by 1D interchain weak hydrogen bonding array between terminal cyanoacetate ligands along c axis (C7H••• N2) (Figure 4) and the intermolecular hydrogen bonding between unbound O atom from cyanoacetate and H atom from coordination water molecules (O1H•••O3), additionally, weak hydrogen bonding between the pyridyl H atom from μ 2 -bpy and coordination water molecules (C2H•••O3).…”

“…It contains both nitrile (−CN) and carboxylic groups which not only provides coordination sites but also effectively serves as a hydrogen acceptor site at the cyano group as well as fabricating the intermolecular N· ··π interaction toward neighboring electron-deficient aromatic moieties. − In general, the intermolecular noncovalent interactions are useful tools for the construction of a soft supramolecular framework ,,, with low dimensional molecular building blocks that can show a variety of structural dynamic behaviors, such as reversible single-crystal-to-single-crystal, reversible single crystal to amorphous, and also nonreversible transformations. ,,− Therefore, these versatile connection sites allow the cyanoacetate to be a promising candidate for constructing flexible but robust coordination frameworks. However, the chemistry of coordination complexes containing cyanoacetate has been rarely explored to date. − Apart from carboxylate linkers, the N,N ′-ditopic spacers are frequently used as ancillary ligands for dimensional extension. Their length, rigidity, and functional groups have consequential effects on the final structures of coordination networks.…”

Crystal structure of diaqua(4,4'-bipyridine-N,N')-bis(2-benzoylbenzoato)- cadmium(II) dihydrate, Cd(C14H9O3)2(C10H8N2)(H2O)2 · 2H2O

“…4,4'-bipyridine is an excellent bridging ligand, it coordinates most transitional metals via Natom to produce aseries of complexes possessing novel structures [1][2][3][4][5].2-Benzoylbenzoic acid is amain raw material of anthraquinone dyes intermediates. It is used to manufacture anthraquinone and 1-aminoanthra-quinone.…”