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Melting point: −90 °C; −130 °F; 183 K Boiling point: 39 to 43 °C; 102 to 109 °F; 312 to 316 K ... Cyclopentadiene is an organic compound with the formula C 5 ...
Melting point: 32.5 °C (90.5 °F; 305.6 K) ... The spontaneous dimerization of neat cyclopentadiene at room temperature to form dicyclopentadiene proceeds to around ...
Melting point: −135 °C (−211 °F; 138 K) Boiling point: ... It can also be produced by the catalytic hydrogenation of cyclopentadiene. [6] Reactions
In former times, the sodium was provided in the form of "sodium wire" or "sodium sand", a fine dispersion of sodium prepared by melting sodium in refluxing xylene and rapidly stirring. [4] [5] Sodium hydride is a convenient base: [6] NaH + 2 C 5 H 6 → NaC 5 H 5 + H 2. In early work, Grignard reagents were used as bases.
Magnesocene is a white solid at room temperature. [1] It has a melting point of 176 °C, though at atmospheric pressures it sublimes at 100 °C. [1] Unlike ferrocene, magnesocene displays slight dissociation and subsequent ion association in polar, electron-donating solvents (such as ether and THF).
The C 5 O core of the molecule is planar and conjugated, but the bonds have a definite alternating single- and double-bond nature. The C2–C3 and C4–C5 distances are 1.35 Å, while the C1–C2, C3–C4, C5–C1 are closer to single bonds with distances near 1.50 Å. [1]
Melting point: −80 °C (−112 °F; 193 K) Boiling point: ... Sesquifulvalene – composed of linked cyclopentadiene and cycloheptatriene rings.
Substitution of all hydrogen atoms in arsole with phenyl groups yields yellow needles of crystalline pentaphenylarsole, which has a melting point of 215 °C. This complex can be prepared, at a yield of 50–93%, by reacting 1,4-diiodo-1,2,3,4-tetraphenylbutadiene [ 12 ] or 1,4-dilithio-1,2,3,4-tetraphenylbutadiene with phenylarsenous dichloride ...