Select the statements that correctly describe the regio- and stereochemical outc

Question

Select the statements that correctly describe the regio- and stereochemical outcome of the hydroboration-oxidation reaction: (A) syn-addition of  H-B species;  (B) anti-addition of H-B species (C) hydrogen adds first, followed by rearrangement of the resulting carbocation to a more stable species, then boron adds last; (D) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by inversion of configuration; (E) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by retention of configuration; A A, C, and D
B B, C, and D
C A and D
D B and C
E A and E
F B and E
Select the statements that correctly describe the regio- and stereochemical outcome of the hydroboration-oxidation reaction: (A) syn-addition of  H-B species;  (B) anti-addition of H-B species (C) hydrogen adds first, followed by rearrangement of the resulting carbocation to a more stable species, then boron adds last; (D) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by inversion of configuration; (E) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by retention of configuration; A A, C, and D
B B, C, and D
C A and D
D B and C
E A and E
F B and E
Select the statements that correctly describe the regio- and stereochemical outcome of the hydroboration-oxidation reaction: (A) syn-addition of  H-B species;  (B) anti-addition of H-B species (C) hydrogen adds first, followed by rearrangement of the resulting carbocation to a more stable species, then boron adds last; (D) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by inversion of configuration; (E) oxidation step (cleavage of C-B and formation of C-O bond) is accompanied by retention of configuration; A A, C, and D
B B, C, and D
C A and D
D B and C
E A and E
F B and E

Explanation / Answer

answer E (A and E) are correct.

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