Key-3 - Chemistry 30.102 Third Examination Spring 2011 K63...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chemistry 30.102 Third Examination Spring 2011 K63 Name (Please Print Ciearly) la. (8 points) Co(III) forms octahedral complex ions. Draw the structures of the possible isomers of (Co+3)(NH3)4(Cl’)2 . Cl: 7/ a Nll N Hz NH} Cl 3\ C +3/ \\ 043/ NEE/l ‘\ N H3 N93 / \\ NH3 Cl- ~93 Trams st lb. (7 points) Give an example of a bidentate ligand. 0 CH2.“ 0442 PI Claw-c” / \ , / \ .— NH‘L NH}- 0 0 QXdll‘C. amal- emaleneohamme V am (Ed SCAG TWO 1‘5 Score: 2a. (7 points) Aluminum has the same number of valence electrons as boron. What kind of structure and bonding would you expect for AIZCI6 ? N2 @ Score: ‘ 5 _._.____ 3a. (10 points) Show how the two sp hybrid orbitals can be constructed from a 25 and the appropriate 2p atomic orbitals (mathematical equations). VS? ‘ fill: J" um (“‘33 “(Sp z ’les —- 71Lpr (5‘ F") 3b. (10 points) Indicate Via a drawing (i) the superimposed individual atomic orbitals and (ii) the shape of the hybrid orbital that results. (Do this separately for both of the two hybrid orbitals.) @ -———> @® @1719) . (5 PTS) @3 -———9 @6 Score: a O _.___ 4a. (7 points) Consider the linear molecule N—C—C—N (showing only What is connected to What, not the number of bonds). What type of hybrid orbitals would you expect on each atom? How many 0' and 7: bonds are there in the molecule (indicate Where)? What is the dipole moment? S'P 3? Sp .5? 0’ :NEC—CEN: t 3' 3): (arm) (ms) N"C"C”N 4b. (8 points) Carbon can exist in molecules with three distinctly different bonding geometries Give a simple example that illustrates each geometry. What kind of hybrid orbitals are used in each? (39 mail/mm 9 .ei’halene (3.3 aceiglemfi ‘f‘ejTA healmj \qmr +m6ami hww‘f $133 3P2 habfid$ ii A Hacg __H H/ ’C\ Li Score: I 5a. (10 pts) For carbon monoxide the order of the MO's is, (323, 625*, 21:, 0’21) , 27:*, 0213*. Give the MO picture of the bonding in this molecule; would CO' be more stable than CO? CO+? 5b. ( 10 points) Using the language of hybrid orbitals, describe the bonding in and the geometry of the following molecules; draw as accurate a picture as possible. CH3CHCH2 CH3CH20H CH3COOH ' 3 p3 kl H» 0 loan“? H A ll | / / _. A \ W./ /H‘ +} H'\ C—éofiy ‘3‘ C26: v V? \ I ‘2 I H/ 7 \H 3”? 50 59" Pm“ \§ 1 «9? W m. ml 5 '5 P 1'61”- (P planM 1’63” mkedml ' +rtyamj @0313) Score: 6. (15 ptg) The planar molecule hexatriene is shown below. Using the particle—in~a—box wavefunctions as a guide indicate the linear combinations (just use plus and minus signs) of appropriate 2p orbitals that are required to accomodate the TC electrons in this system (the three lowest—energy molecular orbitals). Schematically indicate the electron density contribution of each. H /H \C= C /H \ H H/ C: C\ / / __ H/ H @933 Particle—m-a-box wave functions W slgmpattem of coeffimems Schematic pictures of the TC electron distribution Score: I S ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern