The Amine Complexes of Aluminum Hydride. I.

Ruff, John K.; Hawthorne, M. Frederick

doi:10.1021/ja01494a013

Cited by 165 publications

(103 citation statements)

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“…accordance with the fact that chelation increases the activity. e chelation reduces the polarity [24,25] of the metal ion, mainly, because of the partial sharing of its positive charge with the donor groups and possibly the -electron delocalization within the whole chelate ring [26][27][28]. is process of chelation thus increases the lipophilic nature of the central metal atom, which in turn favours its permeation through the lipid layer of the membrane [29][30][31].…”

Section: 3mentioning

confidence: 99%

Synthesis, Structural, and Antimicrobial Studies of Some New Coordination Compounds of Palladium(II) with Azomethines Derived from Amino Acids

Gupta

Sihag

Varshney

et al. 2012

Journal of Chemistry

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Some new coordination compounds of palladium(II) have been synthesized by the reaction of palladium(II) acetate with azomethines in a 1 : 2 molar ratio using acetonitrile as a reaction medium. Azomethines used in these studies have been prepared by the condensation of 2-acetyl �uorene and 4-acetyl biphenyl with glycine, alanine, valine, and leucine in methanol. An attempt has been made to probe their bonding and structures on the basis of elemental analyses and IR, 1 H, and 13 C NMR spectral studies. Pd(II) compounds have been found to be more active than their uncomplexed ligands as both of them were screened for antibacterial, antifungal, and insecticidal activities.

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Section: 3mentioning

confidence: 99%

Synthesis, Structural, and Antimicrobial Studies of Some New Coordination Compounds of Palladium(II) with Azomethines Derived from Amino Acids

Gupta

Sihag

Varshney

et al. 2012

Journal of Chemistry

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“…[5]) shows that both nitrogen atoms react with equal probability. I t has been observed from the evidence available (7,8) Me NIe for the product of reaction [4] seems unliliely. Even when a large excess of trimethylaluminum is present and even under vigorous reaction conditions (i.e., heating for a prolonged period of time), we also found no indication t h a t an -NN2 group would react more than once with the trinlethylaluminu~n.…”

Section: Reaction Of Trimethylaluminztm With Tetramethylhydrazi7zementioning

confidence: 99%

“…[4]) or 1,2-dimethylhydrazine (eq. [5]) shows that both nitrogen atoms react with equal probability.…”

Section: Reaction Of Trimethylaluminztm With Tetramethylhydrazi7zementioning

confidence: 99%

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The Chemistry of Aluminum-Nitrogen Compounds: I. Reactions of Trimethylaluminum and Trimethylaluminum Trimethylamine With Several Methylhydrazines

Fetter¹,

Bartocha²

1961

Can. J. Chem.

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The reactions of trimethylaluminum and trimethylaluminum trimethylamine with various methylhydrazines have produced a number of complexes and polymers: with methylhydrazine, both Me3Al and Me3Al:NMe3 produce the polymer [—MeAlNHNMe—]n with 1,2-dimethylhydrazine, both produce the polymer [—Al(MeNNMe)1.5—]n; with 1,1-dimethylhydrazine, Me3Al produces [Me2Al—NHNMe2]2 and Me3Al:NMe3 produces the unusual complex Me2Al(NHNMe2) (NH2NMe2); with trimethylhydrazine, Me3Al produces [Me2Al—NMeNMe2]2 and Me3Al:NMe3 produces an isomer with the same formula but an as-yet-uncharacterized structure. In addition, the intermediate Me3Al:NHMeNMe2 has been isolated from the reaction of either Me3Al or Me3Al:NMe3 with trimethylhydrazine. With tetramethylhydrazine, Me3Al produces Me3Al:NMe2NMe2. The formation of the complexes with covalent aluminum–nitrogen bonds is specific and methane is the only gas eliminated during these reactions.

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“…This colligative property is also used to determine the molecular weight of the solute. 29 However, when the molecular weight of the solute exceeds a few thousand, the difference in molecular weight has very small effect on the melting point depression of the solvent. 30 Our observation is consistent with this expectation.…”

Section: Melting Behavior Of Cyclohexane In Pdms Precursorsmentioning

confidence: 99%

Anomalous melting behavior of cyclohexane and cyclooctane in poly(dimethyl siloxane) precursors and model networks

McKenna

2008

J Polym Sci B Polym Phys

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Building on previous observations of anomalous melting behavior of solvents in polyisoprene, we have expanded our insight into the melting behavior of organic solvents in polymers and polymer networks through a calorimetric investigation of cylcohexane and cyclooctane in poly(dimethyl siloxane) (PDMS) precursors and model networks. The results are contrary to general expectations. Besides deviations between the predictions of the Flory-Huggins model and observed melting point depression of the small molecule organics, it is found that the melting point depression of cyclohexane in model networks is lower than that in the uncrosslinked precursors and unaffected by the molecular weight between crosslinks, which is not consistent with the general observation that higher crosslinking density leads to greater melting point depression. We interpret the observed phenomenon in terms of phase separation. In the case of cyclooctane, it exhibits a double melting peak in the model networks with high molecular weight between crosslinks. Furthermore, the heats of fusion of both cyclohexane and cyclooctane decrease with increasing polymer volume fraction which violates the underlying assumption that the heat of fusion of solvent in the polymer is the same as that in the bulk for both the Flory-Huggins model and the Gibbs-Thomson equation.

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The Amine Complexes of Aluminum Hydride. I.

Cited by 165 publications

References 0 publications

Synthesis, Structural, and Antimicrobial Studies of Some New Coordination Compounds of Palladium(II) with Azomethines Derived from Amino Acids

Synthesis, Structural, and Antimicrobial Studies of Some New Coordination Compounds of Palladium(II) with Azomethines Derived from Amino Acids

The Chemistry of Aluminum-Nitrogen Compounds: I. Reactions of Trimethylaluminum and Trimethylaluminum Trimethylamine With Several Methylhydrazines

Anomalous melting behavior of cyclohexane and cyclooctane in poly(dimethyl siloxane) precursors and model networks

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