Question

please give correct answer to these 5 questions with explanations, thankyou

What is the name of the product formed from the following Sn1 reaction? When a substitution reaction takes place at a stereocentre, which of the following statements is TRUE? VoH HI Select one: a. An SN2 reaction results in inversion of configuration only b. An SN 1 reaction results in inversion of configuration only c. An SN2 reaction results in racemisation only d. An SN2 reaction results in retention of configuration only e. An SN 1 reaction results in retention of configuration only Select one: O a. 3-ethyl-3-methyl-3-iodopropane b. 3-ethyl-3-iodobutane C. 3-iodo-3-methylpentene O d. 3-iodo-3-methylpentane e. 2-ethyl-2-iodobutane The transition state of a bimolecular nucleophilic substitution of a haloalkane adopts a_ geometry What is/are the product(s) formed from the following reaction? Select one A square planar B. trigonal planar C. trigonal bipyramidal D. tetrahedral E octahedral TH, ,30 " Η Which of the following statement is NOT true for S2 reaction? Select one: o a. Oh ICH OHH Ph н Phcн, Select one: a. Both nucleophile and alkyl halide are involved in rate determining step b. Steric crowding makes the nucleophilic attack more unfavourable. O c. The product involved retention of the stereochemistry in chiral substrates, d. Bimolecular, follows second order kinetics e. The product involved inversion of the stereochemistry in chiral substrates ob. 0. PhCH OCH CPH od. Con CH PhH Ph OH O e. Phoн

Answer 1

"Xon H o hino - *! I Correct option : d (3-iodo-3-methy" Pentane) Ph . litsk Hzö. CH3 Ph. Ph perut 4 cl CH3 Resonance Stabilized Cambocation.

As the Carbo lation is trigonal planar hence there is two possibility of attack by t20 from above or below the plane urn Ei A "CH3 H CH3 H 3 CH2 stabilization of Cation by the effect of benzene sing. Hence, option ② is correct. 3. When substitution takes place at a stereocentre then 1. @ An SN2 reaction results in inversion of Configuration. 1 CH₂ CH3 Inversion of Configuration e t 5.2 I (R changes to s) (R)-2 chlorobutane sool-iodobutane 4. The transition State of biono leculars racheophilic Substi- tntion of a halo alkane adopts a trigonal bibyramidal geometry CH2CH3 o 8 d . .. Iº y I H2CH3 A 1 КТ H3 CH3 - CH2 CH3 G- CH2 CH3 el CH3 (Trigonal buryramidal geosnetry. of Transitim State) not true statement is C restention of stereochemistry in Chiral s. For SN2 reaction broduct involved substratess.