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The synthesis and characterization of thermally stable monosubstituted thiophene 1-oxide and 1-imides stabilized by EMind (1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl) group on the 3-position are described. In addition to the molecular structures determined by X-ray crystallography, inversion barriers at the three-coordinated sulfur atoms have been determined by a coalescence method using diastereotopic C-3 and C-5 indacene carbon atoms as a 13C NMR probe.

Kinetic stabilization with sterically bulky substituents or ligands has played a pivotal role in exploring a large variety of unsaturated compounds or low-coordinated complexes. This article descri...

A zinc porphyrin–fullerene dyad with a disilane as a σ-conjugated linker has been newly synthesized to evaluate the electron transfer ability of the oligosilane chain. Its photoinduced processes ha...

Several configurationally constrained cis- and trans-1,2-diaryl-1,2-dimethyl-1,2-disilacyclohexanes (3a–e) have been synthesized in order to measure their photophysical properties, such as UV absor...

Several types of α-alkoxy and α-amino substituted silyllithiums have been prepared as the first members of stable and/or well-characterizable functionalized silyllithiums. Described herein are new aspects of (1) three methodologies for preparation of functionalized silyllithiums, (2) high stability of (aminosilyl)lithiums, (3) low stability of (monoalkoxysilyl)lithiums, behaving as silylenoid species, (4) high stability of (dialkoxysilyl)lithiums, (5) high stability of (2-alkoxydisilanyl)lithium, (6) first examples of [2,3]-sila-Wittig rearrangement, and (7) synthetic utilization of (aminosilyl)lithiums.

The purpose of this work is the theoretical elucidation of the origin of the unusually long UV-vis absorption maximum, λmax = 398 nm, of 3,3′,4,4′-tetraphenyl-2,2′-bisilole, which we have observed ...

It has been established that dihalodiphosphinenickel(II) complexes exhibit extremely high catalytic activity for selective cross-coupling of Grignard reagents with aryl and alkenyl halides. This catalytic reaction can be employed in synthetic practice for reasons of simple procedures, mild reaction conditions, high yields and high purity of the coupling products, and the wide applicability to reactions involving primary and secondary alkyl (regardless of the presence or absence of β-hydrogen (s)), aryl, and alkenyl Grignard reagents and nonfused, fused, and substituted aromatic halides and haloolefins. Limitations lie in sluggish reactions between alkyl Grignard reagents and dihaloethylenes. The most effective catalysts are [Ni{(C6H5)2P(CH2)3P(C6H5)2}Cl2] for alkyl and simple aryl Grignard reagents, [Ni{(CH3)2P(CH2)2P(CH3)2}Cl2] for alkenyl and allylic Grignard reagents and [Ni{P(C6H5)3}2-Cl2] for sterically hindered aryl Grignard reagents and halides. Great stabilizing effects of phosphine ligands on the...