Outer-Sphere 2 e /2 H Transfer Reactions of Ruthenium(II)-Amine and Ruthenium(IV)-Amido Complexes.

A diverse set of 2 e /2 H reactions are described that interconvert [Ru (bpy)(en*) ] and [Ru (bpy)(en-H*) ] (bpy=2,2'-bipyridine, en*=H NCMe CMe NH , en*-H=H NCMe CMe NH ), forming or cleaving different O-H, N-H, S-H, and C-H bonds. The reactions involve quinones, hydrazines, thiols, and 1,3-cyclohexadiene. These proton-coupled electron transfer reactions occur without substrate binding to the ruthenium center, but instead with precursor complex formation by hydrogen bonding.

Genome Sequence and Transcriptome Analyses of Chrysochromulina tobin: Metabolic Tools for Enhanced Algal Fitness in the Prominent Order Prymnesiales (Haptophyceae).

Haptophytes are recognized as seminal players in aquatic ecosystem function. These algae are important in global carbon sequestration, form destructive harmful blooms, and given their rich fatty acid content, serve as a highly nutritive food source to a broad range of eco-cohorts. Haptophyte dominance in both fresh and marine waters is supported by the mixotrophic nature of many taxa.

N,O-Chelating Four-Membered Metallacyclic Titanium(IV) Complexes for Atom-Economic Catalytic Reactions.

Titanium, as the second most abundant transition metal in the earth's crust, lends itself as a sustainable and inexpensive resource in catalysis. Its nontoxicity and biocompatibility are also attractive features for handling and disposal. Titanium has excelled as a catalyst for a broad range of transformations, including ethylene and α-olefin polymerizations.

Ligand effects on the oxidative addition of halogens to (dpp-nacnac(R))Rh(phdi).

The treatment of (dpp-nacnac(R))Rh(phdi) {(dpp-nacnac(R))(-) = CH[C(R)(N-(i)Pr2C6H3)]2(-); R = CH3, CF3; phdi = 9,10-phenanthrenediimine} with X2 oxidants afforded octahedral rhodium(III) products in the case of X = Cl and Br. The octahedral complexes exhibit well-behaved cyclic voltammograms in which a two-electron reduction is observed to regenerate the initial rhodium(I) complex. When treated with I2, (dpp-nacnac(CH3))Rh(phdi) produced a square pyramidal η(1)-I2 complex, which was characterized by NMR and UV-vis spectroscopies, mass spectrometry, and X-ray crystallography.

A Comprehensive GC-MS Sub-Microscale Assay for Fatty Acids and its Applications.

Fatty acid analysis is essential to a broad range of applications including those associated with the nascent algal biofuel and algal bioproduct industries. Current fatty acid profiling methods require lengthy, sequential extraction and transesterification steps necessitating significant quantities of analyte. We report the development of a rapid, microscale, single-step, in situ protocol for GC-MS lipid analysis that requires only 250 μg dry mass per sample.

Redox behavior of rhodium 9,10-phenanthrenediimine complexes.

New square-planar rhodium complexes of the redox-active ligand 9,10-phenenthrenediimine (phdi) have been prepared and studied. The complexes [dpp-nacnac(CH3)]Rh(phdi) (2a; [dpp-nacnac(CH3)](-) = CH[C(Me)(N-(i)Pr(2)C(6)H(3))](2)(-)) and [dpp-nacnac(CF3)]Rh(phdi) (2b; [dpp-nacnac(CF3)](-) = CH[C(CF(3))(N-(i)Pr(2)C(6)H(3))](2)(-)) have been prepared from the corresponding [nacnac]Rh(CO)(2) synthons by treatment with Me(3)NO in the presence of the phdi ligand. Complexes 2a and 2b are diamagnetic, and their absorption spectra are dominated by intense charge-transfer transitions throughout the visible region.