Question

NA afte. 9 Select the most stable conformation for trans-1-tert-butyl-3-methylcyclohexane. н D A 10. Which of the following compounds are optically active [will rotate plane polarized light (is chiral)]? CIL CI CI CI C/. CI A CI CI В D С 11. Rank absorption of the indicated bonds in decreasing (highest to lowest) wavenumber. II н x III a) III> II>I b) I> II III OH c) II>I> IlI d) III I> II но, но—н 12. How many stereocenters are in Vitamin B2? HO H Vitamin B2 но—н H H a) 3 Hас b) 4 c) 5 NJ N. NH N Hас" d) 7 O 13. Which of the following is the most stable chair conformation of the following cyclohexanc? A. В. С. D.

Answer 1

2 Bulkier groups occupies equatorial positions in chaix con formation to give maximum stability to the structure - most bulkien The structure in which both substituente lace at cocket positions will be most stable. equatorial EH (Methyl Both t-butyl group trans position and CH group are in option (A) is connect

TO Those molecule which are optically inactive. has plane of symmetry - - Plane of symmetry - optically Inactive. ya → No plane of Symmetsy J optically Active] - - Plane of symmetry optically Inactive. CITI! → - No chiral carbon optically Inactive. e option (B) is correct !