Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands was written by Frey, Steven T.;Ballot, Jasper G.;Hands, Allison;Cirka, Haley A.;Rinaolo, Katheryn C.;Phalkun, Nich N.;Kaur, Manpreet;Jasinski, Jerry P.. And the article was included in Acta Crystallographica in 2021.Quality Control of 2-Methoxyethylamine The following contents are mentioned in the article:
Structural analyzes of the compounds di-μ-acetato-κ4O:O′;-bis{[2-methoxy-N,N-bis(quinolin-2-ylmethyl)ethanamine-κ4N,N′,N′′,O]manganese(II)} bis(tetraphenylborate) dichloromethane 1.45-solvate, [Mn2(C23O2)2(C23H23N3O)2](C24H20B).1.45CH2Cl2 or [Mn(DQMEA)(μ-OAc)2Mn(DQMEA)](BPh4)2.1.45CH2Cl2 or [1](BPh4)2.1.45CH2Cl2, and (acetato-κO)[2-hydroxy-N,N-bis(quinolin-2-ylmethyl)ethanamine-κ4N,N′,N′′,O](methanol-κO)manganese(II) tetraphenylborate methanol monosolvate, [Mn(CH3COO)(C22H21N3O)(CH3OH)](C24H20B).CH3OH or [Mn(DQEA)(OAc)(CH3OH)]BPh4.CH3OH or [2]BPh4.CH3OH, by single-crystal X-ray diffraction reveal distinct differences in the geometry of coordination of the tripodal DQEA and DQMEA ligands to MnII ions. In the asym. unit, compound [1](BPh4)2.(CH2Cl2)1.45 crystallizes as a dimer in which each manganese(II) center is coordinated by the central amine nitrogen, the nitrogen atom of each quinoline group, and the methoxy-oxygen of the tetradentate DQMEA ligand, and two bridging-acetate oxygen atoms. The sym. MnII centers have a distorted, octahedral geometry in which the quinoline nitrogen atoms are trans to each other resulting in co-planarity of the quinoline rings. For each MnII center, a coordinated acetate oxygen participates in C-H…O hydrogen-bonding interactions with the two quinolyl moieties, further stabilizing the trans structure. Within the crystal, weak π-π stacking interactions and intermol. cation-anion interactions stabilize the crystal packing. In the asym. unit, compound [2]BPh4.CH3OH crystallizes as a monomer in which the manganese(II) ion is coordinated to the central nitrogen, the nitrogen atom of each quinoline group, and the alc. oxygen of the tetradentate DQEA ligand, an oxygen atom of OAc, and the oxygen atom of a methanol ligand. The geometry of the MnII center in [2]BPh4.CH3OH is also a distorted octahedron, but the quinoline nitrogen atoms are cis to each other in this structure. Hydrogen bonding between the acetate oxygen atoms and hydroxyl (O-H…O) and quinolyl (C-H…O and N-H…O) moieties of the DQEA ligand stabilize the complex in this cis configuration. Within the crystal, dimerization of complexes occurs by the formation of a pair of intermol. O3-H3…O2 hydrogen bonds between the coordinated hydroxyl oxygen of the DQEA ligand of one complex and an acetate oxygen of another. Addnl. hydrogen-bonding and intermol. cation-anion interactions contribute to the crystal packing. This study involved multiple reactions and reactants, such as 2-Methoxyethylamine (cas: 109-85-3Quality Control of 2-Methoxyethylamine).
2-Methoxyethylamine (cas: 109-85-3) belongs to ethers. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of 2-Methoxyethylamine
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem