Table 5 The calculations of ELUMO, EHOMO, band gap (Eg=ELUMO-EHOMO) and the total energy for Pyrano pyrazoles.

From: Natural talc: a basic, cost-effective, and available catalyst for the one-pot synthesis of dihydropyranochromenes and pyranopyrazoles, along with related DFT calculations

Comp.

Etot (a.u)

EHOMO

ELUMO

Eg=ELUMO-EHOMO

1a

− 1001.333758

− 0.2208

− 0.2052

0.015595

2a

− 872.1065607

− 0.2055

− 0.1899

0.015548

3a

− 1256.4913548

− 0.2129

− 0.1971

0.015746

4a

− 911.3989460

− 0.2114

− 0.1958

0.015580

5a

− 836.2259554

− 0.2051

− 0.1898

0.015262

6a

− 747.2975442

− 0.2070

− 0.1963

0.010690

7a

− 1716.0609398

− 0.2050

− 0.1890

0.015970

8a

− 786.5830975

− 0.2070

− 0.1919

0.015010

9a

− 895.3630129

− 0.2056

− 0.1900

0.015555