Question

14. What types of strain are found in trans--1,3-dimethylcyclohexane? CH3 7 SCH a. Angle strain b. Torsional strain c. Steric strain d. More than 1 of the above 15. Which of the following compounds is meso? OH | H | C | 16. Which of the following Fischer projects is for an achiral molecule?! OH | OH OH OH Hㅐ 애 H HH HO|—H HO|H H —OH HOẠ |_H 바애 애 HI-OH HI-OH HOH HOLH HO HO HO ㅎF 호 H 애 호도 운 HO AB 17. This of the following is a Newman projection for the following compound as viewed down the indicated bond in the conformation shown. | H, Br tBr att alH HIT , CIL 새 I

Answer 1

H HL CH2 Steric interaction between CH3 Caxial) 43 with and H Caxial) makes the system HH more energetic. Therefore, c) Steric strain is present. 15. Meso Compound has chiral Centres & Super imposable 1. With its mirror image and it contains an internal - plane of symmetry. OHOH FILM CAD plane of symmetry plane of Symmetry (meso) of Therefore (A) & (e) are meso compound

16. A molecule should be achiral when it contains a plane of symmetry. so option B is correct. LOH HTOH H... Plane of symmetry HOS HOAH - OH 17. , BC H . t Br | 3