Least Stable Chair Most Stable Chair
Q1. (a) Methylcyclohexane can exist in two different chair conformations, one of which is 1.8 kcal/molmore stable than the other, i.e., the A value for the methyl group is 1.8. In each of the two boxes below,draw in a bond to one methyl (CH3) group in the appropriate position. (2 pt)CH31!G 1–1.8 kcal/molLeast stable chair1Most stable chair(b) Chlorocyclohexane also exists in two different chair conformations, one of which is 0.6 kcal/molmore stable than the other, i.e., the A value for the chloro group is 0.6. In each of the two boxes below,draw in a bond to one chloro (Cl) group in the appropriate position. (2 pt)Cl1!G 11–0.6 kcal/molLeast stable chairMost stable chair(c) For trans-1-chloro-4-methylcyclohexane (shown below), draw in bonds to CH3 and Cl groups asappropriate, to indicate the least and most stable chair conformers. Assuming that A values are additive(and hence subtractive if necessary.), predict what the ΔG value will be. (6 pt)!G Cl111CH3Least stable chairkcal/molQuestion 1 is continued on the next page.Most stable chair
(d) For cis-1-chloro-4-methylcyclohexane (shown below), draw in bonds to CH3 and Cl groups asappropriate, to indicate the least and most stable chair conformers. Assuming that A values are additive(and hence subtractive if necessary.), predict what the ΔG value will be. (6 pt)!G Cl111CH3Least stable chairkcal/molMost stable chair(e) For the isomer of 1-chloro-3,5-dimethylcyclohexane shown below, draw in bonds to CH3 and Clgroups as appropriate, to indicate the least and most stable chair conformers. Assuming that A valuesare additive (and hence subtractive if necessary.), predict what the ΔG value will be. (8 pt)!G CH3Cl111CH3Least stable chairMost stable chairkcal/mol(f) In the appropriate boxes below, draw the three most stable conformations of cyclohexylcyclohexane (shown to the right) in which the indicatedH atoms maintain an ANTI relationship, i.e., are 180 apart. Once you havedrawn these three different conformers, use the box below them to brieflyexplain your answers. (12 t Stable ConformerExplanation:2nd Most Stable Conformer3rd Most Stable Conformer
Q2. (a) Methylcyclohexane (shown in the middle below) can exist in two different chair conformations,one of which is 1.8 kcal/mol more stable than the other. In each of the top two boxes below, draw in abond to one methyl (Me) group in the appropriate position. In the bottom two boxes, complete theNewman projections by filling in methyl (Me) groups AND hydrogen atoms (H) where appropriate.(4 points)1!G –1.8 kcal/mol1CH3Least stable chair16Most stable chair23542133!G –1.8 kcal/mol12Least stable chairMost stable chair(b) trans-1,4-Dimethylcyclohexane (shown below) also exists in two different chair conformations, one ofwhich is 3.6 kcal/mol more stable than the other. In each of the boxes below, draw in methyl (Me)groups in the appropriate positions. (4 points)CH3CH3!G –3.6 kcal/molLeast stable chairQuestion 3 is continued on the next page.Most stable chair
(c) trans-1,2-Dimethylcyclohexane (shown below) also exists in two different chair conformations, one ofwhich is 2.7 kcal/mol more stable than the other. In each of the boxes below, draw in methyl (Me)groups in the appropriate positions. (4 points)H3C!G –2.7 kcal/molCH3Least stable chairMost stable chair(d) In the box below, explain (using appropriate diagrams if you wish), why the difference in energybetween the two chair conformations of trans-1,2-dimethylcyclohexane is 0.9 kcal/mol LESS than thedifference in energy between the two chair conformations of trans-1,4-dimethylcyclohexane. (8 points)Question 2 is continued on the next page.
For each of the questions below (e–h) draw the most stable chair conformation for each compound, andin each case give a succinct reason for your choice. (Hint: the answers aren’t perhaps as easy as you may thinkthey are.) (2 2 points each)(e)(f)OCH3H3CCH3CH3reason:(g)Brreason:(h)NH3 Ireason:CO2–reason:(i) When the compound in part (h) is treated with a strong acid, a new compound is formed. Draw themost stable chair conformation of this new product and justify your choice (4 points)
Least stable chair Most stable chair 1 1 1 Ð0.6 kcal/mol!G (c) For trans-1-chloro-4-methylcyclohexane (shown below), draw in bonds to CH3 and Cl groups as appropriate, to indicate the least and most stable chair conformers. Assuming that A values are additive (and hence subtractive if necessary.), predict what the ΔG value will be. (6 pt) Cl
(1) Place a massage chair in a place where there is enough space for the back of the chair to recline and the stand to rise. (2) Make sure that there is at least 20 cm in the back of the massage chair and at least 30 cm in front of the massage chair.In order to prevent from signal interference, please keep at least 1m away from
(1) Place a massage chair in a place where there is enough space for the back of the chair to recline and the stand to rise. (2) Make sure that there is at least 30 cm in the back of the massage chair and at least 30 cm in front of the massage chair.In order to prevent from signal interference, please keep at least 1m away from
Introduction and Overview at W3C Open Day May 2017 OpenFog Consortium . Technology Innovation Education. Chair(s) Architecture Framework WG Chair(s) Communications WG Chair(s) SW Infrastructure WG Chair(s) Security WG Chair(s) Manageability WG Chair(s) Testbed WG Organizational structure Chair(s)
Swathi Ranga Chair - Decoration/Stage Kotla Tippareddy Chair - Sports Swathi Kuditipudi Education/Literacy/Telugu Promotion-Chair Suma Donga Membership Promotion - Chair Murali Batchu Publicity Chair Ramki Komakula Media Chair Raj Pasumarthi Community Service - Chair Vamsi Reddy Ingu Public
10 Clicking on ‘My Chair’ brings the client to the detailed chair section with specifications such as the chair serial number, status of the chair and when the chair was last synced. From ‘My Chair’ menu clicking on ‘Support’ the user will be able to see which branch the cha
Install the Chair 86.0087.00 Rev E 3 I NSTALL THE C HAIR Position the Chair 1. Remove all items and cardboard from around the chair. 2. Remove the covers. 3. Use a 3/4" socket and ratchet to remove the bolts securing the chair to the pallet. 4. Grasp an armrest and the front of the chair frame. Lift and place the chair in position in the .
facing your chair lay the ChairSpeaker over the back of your chair and press the links hard against the chair to conform to the shape of your chair. Make sure some links go over the back. The rubber will hold onto your chair. Wrap the speakers around the head rest of the chair with the volume knob on the left for the user at about ear height.
panied by legal questions.2 We believe that our modern high-technology era will be faced by an unusual number of such questions growing out of what we will undoubtedly term, “artificial intelligence” (“AI”), but which in fact is the combination of advanced algorithms, important pools of data, usually referred to as “big data,” and the many technol-ogies that exploit these. Some .
