Rotational spectroscopy is the technique of choice for investigating molecular structures in
the gas phase. Indeed, rotational constants are strongly connected to the geometry of the …

Astrochemistry lies at the nexus of astronomy, chemistry, and molecular physics. On the
basis of precise laboratory data, a rich collection of more than 200 familiar and exotic …

To date, 241 individual molecular species, composed of 19 different elements, have been
detected in the interstellar and circumstellar medium by astronomical observations. These …

Much like six-membered rings, five-membered rings are ubiquitous in organic chemistry,
frequently serving as the building blocks for larger molecules, including many of biochemical …

We report the detection of fulvenallene (cC 5 H 4 CCH 2) in the direction of TMC-1 with the
QUIJOTE 1 line survey. Thirty rotational transitions with K a= 0, 1, 2, 3 and J= 9− 15 were …

We report the detection of two isomers of ethynyl cyclopentadiene (cC 5 H 5 CCH), namely 1-
and 2-ethynyl-1, 3-cyclopentadiene, in the direction of TMC-1. We derive column densities of …

Aims. We investigate the outcome of an electrical discharge of naphthalene and search for
the resulting products in the Taurus Molecular Cloud (TMC-1). Methods. Using chirped pulse …

We have conducted an extensive search for nitrogen-, oxygen-, and sulfur-bearing
heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband …

Using radio observations with the Green Bank Telescope, evidence has now been found for
a second five-membered ring in the dense cloud Taurus Molecular Cloud-1 (TMC-1). Based …

The presence of carbon-chain molecules in the interstellar medium (ISM) has been known
since the early 1970s and> 130 such species have been identified to date, making up∼ …