2021年10月14日 · Spiropentane | C5H8 | CID 9088 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Spiropentane is a hydrocarbon with formula C 5 H 8. It is the simplest spiro-connected cycloalkane, a triangulane. [1] [2] [3] [4] It took several years after the discovery in 1887 until the structure of the molecule was determined. [5] [6] [7] According to the nomenclature rules for spiro compounds, the systematic name is spiro[2.2]pentane.

There are 230 space groups in three dimensions, given by a number index, and a full name in Hermann–Mauguin notation, and a short name (international short symbol). The long names are given with spaces for readability. The groups each have a point group of the unit cell.

Calculated rotational constants for C 5 H 8 (Spiropentane). Point Group D 2d Internal coordinates (distances (r) in Å) (angles (a) in degrees) (dihedrals (d) in degrees)

vibrational zero-point energy: 24434.5 cm-1 (from fundamental vibrations) Calculated vibrational frequencies for C 5 H 8 (Spiropentane). Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.

Determine the point group (including all the symmetry elements and operations) of given molecules. 1) PCl 3 (All P-Cl bond have same distance and same angles) 2) C 5 H 8 (Spiropentane)

Spiropentane is a prolate symmetric top molecule with princi-pal moments of inertia I A < I B = I C. The rotational constants are then given as A > B in which A = h/(8p2cI A), and B = h/(8p2cI B), where h is Planck’s constant and c is the speed of light in vacuum. The phys-ical constants are chosen such that the rotational constants are

, The mass spectra of isomeric hydrocarbons - II: The C 5 H 8 isomers, spiropentane, cyclopentene, 1,3-pentadiene and isoprene; the mechanisms and energetics of their fragmentations, Org. Mass Spectrom., 1974, 8, 247. Puttemans and Delvaux, 1973

2011年9月1日 · Spiropentane has the symmetry of the D 2d point group and the representation of the 3N-6 normal modes of vibration is Γ vib = 5 a 1 (R) + 3 a 2 + 4 b 1 (R) + 5 b 2 (IR, R) + 8 e (IR, R). The infrared and Raman activities for the fundamental transitions are shown in …

1975年8月1日 · Force constants and normal coordinates are reported for the spiropentane molecule. These data are based on the recently determined fundamental vibration frequencies of spiropentane-H 8.