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- Branched compounds are said to have weaker intermolecular forces of attraction. Therefore, between pentane, a straight-chained compound and 2-methylbutanol which exhibits branching at carbon 2, the former has stronger IMFA. (hint: look at the structure of the two molecules) True or Falsegive a name of any compound which is isostructural with XeF2Most naturally occurring amino acids have chiral centers (the asymmetric a carbon atoms)that are named (S) by the Cahn–Ingold–Prelog convention (Section 5-3). The commonnaturally occurring form of cysteine has a chiral center that is named (R), however.(a) What is the relationship between (R)-cysteine and (S)-alanine? Do they have the oppositethree-dimensional configuration (as the names might suggest) or the same configuration?(b) (S)-Alanine is an l-amino acid (Figure 24-2). Is (R)-cysteine a d-amino acid or anl-amino acid?
- i) Classify the molecule as being saturated or unsaturated. Give a reason for youranswer. ii) Classify the Carbon (marked with a *) as being 1o, 20, 30. State a reason foryour classification.the bonds in the alkene compounds are sigma and bi bonds true or flasewhat is the structure and jvalues? (c10H14O).
- 1a. draw condensed structure for 2,3 dimethylbutane. 1b. next draw condensed structures for a linear isomer and a branched isomer of that compound and name the compounds. 1c. Mn2+ + BiO3 >(Arrow) MnO4 - + Bi3+ Oxidized: Oxidizing agent: Reduced: Reducing Agent:The potential energy of a CH3 group in ethane as it is rotated around the C-C bond can be written V= 1/2V0(1 +cos φ), where φ is the azimuthal angle as shown and V0 = 11.6 kJ mol-1. (a) What is the change in potential energy between the trans and fully eclipsed conformations? (b) Show that for smal lvariations in angle, the torsional (twisting) motion around the C-C bond can be expected to be that of a harmonic oscillator. (d) Estimate the vibrational frequency of this torsional oscil lation.The chiral catalyst (R)-BINAP-Ru is used to hydrogenate alkenes to give alkanes . The products are produced with high enantiomeric excess. An example is the formation of (S)-naproxen, a pain reliever. Q.What kind of isomers are the enantiomers of BINAP?
- A chemist determines that 4.20 L hydrogen at 298 K anda pressure of 1.00 atm is required to completely hydrogenate 48.5 g of the unsaturated compound oleic acid to stearic acid (C18H36O2). How many units of unsaturation (where a unit of unsaturation is one double bond) are in amolecule of oleic acid? (See Sec. 9.1.)The allotrope of carbon known as fullerenes (aka "buckyballs") has a structure best described asThe allotrope of carbon known as fullerenes (aka "buckyballs") has a structure best described asThree dimensional network of carbon atoms joined by single bondsClosed cage structure with sides consisting of 5- and 6-membered rings with alternating double and single bonds.Chain of carbon atoms with alternating double and single bonds.Flat molecule consisting of fused 6-membered rings with alternating double and single bondsShapeless jumble of free carbon atoms.The following molecule is a newly developed drug as pain killers. a) Developasyntheticroutetoformthisdrugfromthefollowingprecursormolecule.Inaddition,you can use any other molecule with four or less than four carbon atoms.