(3)Put the following intermediates in indicated orders. a QOO-w Stability increasing order: b Me3C,CHa.Me2CH,CHaCH2 Stability increasing order. (4)Identify the stereochemical relationships of the following structures (identical,enantiomer,diastereomer). a Ph C年9 a b: 3.Predict major products for following reactions,and indicate the stereochemistry if optional.(30) (1) 、人人 2龄5oH ②人入 H20,H 同人入a购，0 PhCH2CI Hao' w○ Os04,H202 o MCPBA EtOH,H' CH2Cl2.Na2CO3 TsCl,Py AcOK Hou. a 2 (3) Put the following intermediates in indicated orders. a b CH2 + + + Stability increasing order: Me3C. , CH3 . , Me2CH. , CH3CH2 . Stability increasing order: (4) Identify the stereochemical relationships of the following structures (identical, enantiomer, diastereomer). H Ph HO Ph H OH a b H Ph HO OH H Ph Cl H H Cl H Cl H Cl a: b: 3. Predict major products for following reactions, and indicate the stereochemistry if optional. (30) (1) (2) 1, B2H6, THF 2. H2O2, NaOH H2O, H+ (3) (4) (5) (6) (7) (8) Cl Mg, Et2O PhCH2Cl H3O+ OsO4, H2O2 MCPBA CH2Cl2, Na2CO3 EtOH, H+ OH TsCl, Py AcOK Br EtONa Br2, CCl4