3,4-Dihydropyran Singlet oxygen

Chan, Y.-Y.; Li, X.; Zhu, C.; Liu, X.; Zhang, Y.; Liang, X.
J. Org. Chem. 55, 5497-5504 (1990)

Reaction: 3,4-Dihydropyran + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 1.9 × 10³(L mol^-1 s^-1), T = 283K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Methylene Blue; Indicator = 1,3-Diphenylisobenzofuran. used solvent k_d = 7.1 × 10³ s^-1.

Chan, Y.-Y.; Li, X.; Zhu, C.; Liu, X.; Zhang, Y.; Liang, X.
J. Org. Chem. 55, 5497-5504 (1990)

Reaction: 3,4-Dihydropyran + ¹O₂^* ® products and/or physical quenching
Solvent: CCl₄

k = 7.9 × 10⁴(L mol^-1 s^-1), T = 283K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Indicator = Rubrene. used solvent k_d = 1.1 × 10³ s^-1. [Sensitizer] = 5.3 × 10^-5 (mol L^-1).

Chan, Y.-Y.; Li, X.; Zhu, C.; Liu, X.; Zhang, Y.; Liang, X.
J. Org. Chem. 55, 5497-5504 (1990)

Reaction: 3,4-Dihydropyran + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 1.8 × 10⁵(L mol^-1 s^-1), T = 283K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Methylene Blue; Indicator = 1,3-Diphenylisobenzofuran. used solvent k_d = 7.1 × 10³ s^-1. [Sensitizer] = 8.7 × 10^-7 (mol L^-1). [Indicator] = 3.8 × 10^-5 (mol L^-1).

Chan, Y.-Y.; Li, X.; Zhu, C.; Liu, X.; Zhang, Y.; Liang, X.
J. Org. Chem. 55, 5497-5504 (1990)

Reaction: 3,4-Dihydropyran + ¹O₂^* ® products and/or physical quenching
Solvent: CHCl₃

k = 7.1 × 10⁴(L mol^-1 s^-1), T = 298K
k = 6.1 × 10⁴(L mol^-1 s^-1), T = 323K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Indicator = Rubrene. used solvent k_d = 7.1 × 10³ s^-1.

Bartlett, P.D.; Mendenhall, G.D.; Schaap, A.P.
Ann. N.Y. Acad. Sci. 171, 79-87 (1970)

Reaction: 3,4-Dihydropyran + ¹O₂^* ® products
Reference Reaction: 1,4-Dioxene + ¹O₂^* ®
Solvent: (Me)₂CO

k/k_reference = 3.3 × 10^-1
k_react = 7.2 × 10⁴(L mol^-1 s^-1), k_ind = 2.2 × 10⁵(L mol^-1 s^-1), k_reference = 2.2 × 10⁵(L mol^-1 s^-1), T = 281K

Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion.