We report the detection for first time in space of three new pure hydrocarbon cycles TMC-1: c -C 3 HCCH (ethynyl cyclopropenylidene), 5 H 6 (cyclopentadiene), and 9 8 (indene). derive a column density 3.1 × 10 11 cm −2 cycle similar values, range (1−2) 13 , second third. This means that cyclopentadiene indene, spite their large size, are exceptionally abundant, only factor five less abundant th...

The title compound, C(18)H(12)S, comprises five fused rings forming an essentially planar mol-ecule, with a total puckering amplitude (Q) of 0.032 Å and a maximum deviation from the mean plane of 0.014 (4) Å for the C atoms of the methyl-ene groups. A crystallographic mirror plane orthogonal to the mol-ecular plane passes through the S atom and the midpoint of the opposite C-C bond within the c...

In the title compound, C33H29N3O5, the four-membered ring of the β-lactam fragment is essentially planar (r.m.s. deviation = 0.0122 Å), with the carbonyl O atom displaced from this ring by 0.856 (9) Å. The mean planes of the meth-oxy-phenyl and phenyl rings are inclined at dihedral angles 85.10 (7) and 21.56 (14)°, respectively, with respect to the mean plane of the four-membered ring. The pyrr...

A new general protocol for synthesis of fused 1,2,3-dithiazoles by the reaction of cyclic oximes with S₂Cl₂ and pyridine in acetonitrile has been developed. The target 1,2,3-dithiazoles fused with various carbocycles, such as indene, naphthalenone, cyclohexadienone, cyclopentadiene, and benzoannulene, were selectively obtained in low to high yields. In most cases, the hetero ring-closure was ac...

The self-reaction of the phenyl radical is one of the key reactions in combustion chemistry. Here we study this reaction in a high-temperature flow reactor by IR/UV ion dip spectroscopy, using free electron laser radiation as mid-infrared source. We identified several major reaction products based on their infrared spectra, among them indene, 1,2-dihydronaphthalene, naphthalene, biphenyl and pa...

Tautomerism links with many applications and remains an attracting feature in exploring novel systems. In this regard, properties of indene-based HNCCCN segments have not received any considerable attention. In this computational organic chemistry study, first, to calculate the proton transfer energy barrier at a reasonable cost, the study identified an accurate forth order Møller-Plesset pertu...

In the title compound, C(17)H(11)F(3)O(2), the dihydro-indene ring is approximately planar with a maximum deviation of 0.024 (2) Å and makes a dihedral angle of 3.17 (8) Å with the adjacent benzene ring. In the crystal, mol-ecules are inter-connected by C-H⋯O inter-actions, forming an infinite chain along the c axis.