CHa CH3 HH COOH Because models and ll are nonsuperposable mirror images of each other, the molecules that they represent are enantiomers
Because models I and II are nonsuperposable mirror images of each other, the molecules that they represent are enantiomers
Problem 5.1 Classify the following objects as to whether they are chiral(手性) or achiral ) Screw(舌onc Fork (d)Cup (e)Foot (t Ear (g) Shoe(h Spiral staircase(R 旋梯)
Problem 5.1 Classify the following objects as to whether they are chiral (手性） or achiral • (a) Screw （非手性） ( b) plain spoon (c ) Fork • (d) Cup (e) Foot (f) Ear • (g) Shoe (h) Spiral staircase（螺 旋梯）
Problem 5.2 (a)If models are available, construct the 2- butanols represented in Fig. 5.3 and demonstrate for yourself that they are not mutually superposable ( b) Make similar models of 2-propanol CH3CHOHCH3 ). Are they superposable? c)Is 2-propanol chiral? (d)Would you expect to find enantiomeric forms of 2-propanol?
Problem 5.2 • (a) If models are available, construct the 2- butanols represented in Fig. 5.3 and demonstrate for yourself that they are not mutually superposable. • (b) Make similar models of 2-propanol (CH3CHOHCH3 ). Are they superposable? • (c ) Is 2-propanol chiral? • (d) Would you expect to find enantiomeric forms of 2-propanol?
2-Butanol CH2CH3 CH2cH3 HCIIII 111ICH3 H○ OH (nonsuperposable) (chiraL) 2-Propanol CH3 CH3 H3CIIIII H○ OH (superposable) (achiraL
CH2 CH3 H H3 C HO CH2 CH3 H OH CH3 2-Butanol (nonsuperposable) (chiral) CH3 H H3 C HO CH3 H OH CH3 2-Propanol (superposable) (achiral)
one tetrahedral atom with four different groups attached to carbon it is ca| led chiral carbon(手性碳) a)CH3CHCICH3 (b )CH3CHBrCH2 CH3 C)CH3CHOHCHOHCH3()(CH3)2CHOH (e)BrCHCIl (f)CH3CH2CHCICH2CH3
one tetrahedral atom with four different groups attached to carbon, it is called chiral carbon（手性碳） • (a) CH3CHClCH3 (b) CH3CHBrCH2CH3 • (c ) CH3CHOHCHOHCH3 (d) (CH3 )2CHOH • (e) BrCHClI • (f) CH3CH2CHClCH2CH3