Question

Fill in the following blanks in the uv spectrum the ethylenic chromophore shows an absorption band below ______nm. In the IRISH spectrum the Cis isomer of internal elkenes give band at___cm1/2

Answer 1

In the UV spectrum, the ethylenic chromosphere shows an absorption band below 175 nm.

In the IRISH spectrum, the Cis isomer of internal alkenes give band at 1665 to 1635 cm^-1. A CIS isomer is an isomer that has two methyl groups on either side of the double bond. 

Answer 2

Hey dear,

● Answer -
(1) 175 nm
(2) 1665-1635 /cm

● Extra information -
# UV visible spectroscopy -
- aka electronic spectroscopy
- In this amt of light absorbed at each wavelength of UV & visible light spectrum is measured.
- Absorption of EM radiation leads to molecular excitation.

# IRISH Spectroscopy -
- This spectrum measures amt of light absorbed at wavelength of IR spectrum

Hope this helps you...