Crystal structure of the Ni(II) complex with Br-substituted 3-imidazoline nitroxide and methanol

Sygurova, M. K.; Романенко, Г. В.; Vostrikova, Kira E.; Vishnevetskaya, L. A.; Podberezskaya, N. V.

doi:10.1007/bf02579682

Cited by 4 publications

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“…A number of coordination and hydrogen-bonded architectures was designed using metal bis-chelates with deprotonated nitroxide radical derivatives L 5 −L 10 . These include α- and β-[NiL 5 2 ], β-[CoL 5 2 ], [Ni(H 2 O) 2 L 5 2 ], [Ni( n -BuOH) 2 L 5 2 ], , [Ni( i -BuOH) 2 L 5 2 ], [Co(MeOH) 2 L 6 2 ], [CoL 7 2 ] and [CuL 7 2 ], [Ni(MeOH) 2 L 5 2 ] and its Co counterpart, [Ni(MeOH) 2 L 8 2 ] and its Co counterpart, [Ni(MeOH) 2 L 9 2 ], and [Ni(MeOH) 2 L 10 2 ] . The general feature in the series is that nitroxide oxygens connect to neighboring units through either coordination to the metal center or hydrogen bonding to the alcohol hydroxy group.…”

Section: Resultsmentioning

confidence: 99%

“…18 A number of coordination and hydrogen-bonded architectures was designed using metal bis-chelates with deprotonated nitroxide radical derivatives L 5 -L 10 . These include R-and β-[NiL 5 2 ], 19 β-[CoL 5 2 ], 20 [Ni(H 2 O) 2 L 5 2 ], 21 [Ni(n-BuOH) 2 L 5 2 ], 22,23 [Ni(i-BuOH) 2 L 5 2 ], 23 [Co(MeOH) 2 - 27 The general feature in the series is that nitroxide oxygens connect to neighboring units through either coordination to the metal center or hydrogen bonding to the alcohol hydroxy group. Although most efforts were directed at creation of 3-D polymers in order to obtain special magnetic properties, all complexes listed are 2-D polymers.…”

Section: Interaction With Alcohols: Inclusion Vs Coordinationmentioning

confidence: 99%

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Inclusion in Microporous β-Bis(1,1,1-trifluoro-5,5-dimethyl-5- methoxyacetylacetonato)copper(II), an Organic Zeolite Mimic

Soldatov

Ripmeester

2000

Chem. Mater.

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In this contribution, we show that the porous β-form of the title complex preserves its host lattice pore structure in the presence of more than 100 guests. Among the species that are able to promote the α-to-β transformation and that are capable of being included as guests are the gaseous and condensed hydrocarbons, their halo derivatives, alcohols, diols, aldehydes, ketones, ethers, esters, ethers of inorganic acids, acids, nitriles, and a variety of substituted aromatics. The empty β-form behaves like a microporous sponge, instantly absorbing significant quantities even of highly volatile compounds such as methane, ethane, and propane. The material demonstrates zeolite-like behavior, not only from the robustness of the empty pore structure, but also from its propensity for efficient adsorption and desorption. The thermal stability of inclusions with normal paraffins increases from 142 °C (incongruent melting) to 163.5 °C (true melting) in the series from n-C5 to n-C16, while the guest-free α-form of the complex melts at 157 °C. The interaction of the complex with alcohols illustrates competing options between chemical bonding to copper and physical sorption into the microporous β-form. Methanol and ethanol coordinate to copper, thereby taking part in building, respectively, 2-D and 1-D polymers, whereas higher alcohols induce conversion to a 3-D β-form, stabilizing this porous modification by inclusion. From the observed stoichiometry and thermal stability, the host matrix is shown to be capable of molecular recognition of alcohols that have a shape and dimensions complementary to available pore geometry. Finally, the prospects for the rational design of new 3-D microporous polymers of bis-chelate building blocks are discussed.

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