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Highlights: [•] B3LYP as well as FTIR were utilized to analyze thioindigo dye. [•] Vibrational assignments for thioindigo isomers were aided at B3LYP/6-311G(d,p). [•] Cis-isomer is a promising structure for optoelectronic devices as solar cells. [•] Cis-isomer has a high dipole moment (3.44 ...
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Laser flash photolysis of 3-chloro-3-benzyldiazirine and 3-chloro-3-(phenyldideuteriomethyl)diazirine in isooctane over the 60 to -80-degrees-C temperature range gives rise to curved Arrhenius plots for both 1,2-H and 1,2-D migration in benzylchlorcarbene. The k(H)/k(D) values increase smoothly from...
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Chemical studies on the non polar fraction of the methanolic extract of Pseudopterogorgia elisabethae Bayer collected from the Florida Keys has yielded 12-acetoxypseudopterolide (1), a new diterpene of the pseudopterane series. The structure was established through spectroscopic analysis. Compound (...
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A detailed 1H NMR study of the title compds. I (R = Me, R1 = H; R = H, R1 = Cl) using difference NOE spectra and 2-D (COSY) techniques has shown that there is an enhanced restricted rotation about the arene-methine carbon bond with the formation of the complexes.
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Abstract: The title ketene 2 has been generated by laser flash photolysis and observed in solution for the first time, using time-resolved infrared spectroscopy. The kinetics of the reactivity of 2 with H2O, MeOH, and Et2NH with relative reactivities of 1.0, 2.0, and 73 have been measured. These are...
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Non-isothermal crystallisation studies of Organoiron poly(alkynyl methacrylate)s coordinated to dicobalt hexacarbonyl using differential scanning calorimetry (DSC) are reported. Two exothermic peaks appear on crystallisation of the polymers under investigation. Four isoconversional methods (the diff...
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A novel route to the synthesis of some 2-aryl alkanoic acid esters has been achieved. Aromatic nucleophilic substitution of various arene cyclopenta-dienyliron complexes with ethyl ethylacetoacetate and ethyl methylacetoacetate produced the complexed alkanoic acid esters. Photolysis of these complex...
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Over the past few decades, we have seen a growing interest in the development of various classes of metal-contg. polymers. While polymers are traditionally carbon-based materials that contain only a few other elements, organometallic polymers could incorporate almost all the other elements of the pe...
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A review on the prepn. and uses of organometallic polymers having metal-carbon bonds in the main or side chains or heteroatom-metal bonds in the main chain.
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A review, with ∼9 refs., of the use of NMR spectroscopy for the detn. of the structure of a no. of cyclopentadienyliron arene systems. The examples presented here demonstrate the use of 1- and 2-dimensional NMR techniques in predicting the chem. structure and dynamics of these complexes. The nu...
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The fluorescent molecules 1-anilinonaphthalene-8-sulfonate (1,8-ANS) and 2-anilinonaphthalene-6-sulfonate (2,6-ANS) are extremely sensitive to the polarity of their local environment, making them excellent probes for the study of heterogeneous systems, including cyclodextrin (CD) solutions. Both are...
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Marine invertebrates, including octocorals, are a prolific source of marine natural products (MNPs) and are also known to host diverse microbial communities. It is well-established that marine microbes are producers of bioactive secondary metabolites. Accordingly, it is hypothesized that bioactive m...
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A general method for the synthesis of some arylated phenylsulphonylacetonitriles 6a–g, 10a, b and 16 and ethyl cyanoacetates 7a-d and 11a, b is described. Nucleophilic substitution of the cyclopentadienyliron complexes of chloroarenes 1a–g with phenylsulphonylacetonitrile 2 or ethyl cyanoacetate...
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Abstract: This paper describes the host properties of a new cucurbit[6]uril analogue, studied by fluorescence and 1H NMR spectroscopy. This host has an elongated cavity with oval-shaped portals. It is intrinsically fluorescent, and more importantly, this fluorescence is sensitive to guest encapsulat...
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Phenylchlorocarbene, generated by photolysis or thermolysis of the phenylchlorodiazirine, reacts with 2,2'-bipyridyl to give, in alkane solvents, the 6-phenyldipyrido[1,2-c:2',1'-e]i-midazolium chloride. We investigated the mechanism of the reaction by flash photolysis. Like the mechanism of formati...
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Fluorescence enhancement of a probe molecule in solution by the container molecule cucurbituril (CB) is reported for the first time. The fluorescence of the probe 2-anilinonaphthalene-6-sulfonate (2,6-ANS) in aqueous Na2SO4 solution is found to increase by a maximum factor of 5.0 upon addition of cu...
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