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Spartan Lab Questions: 1. Discuss the trend in homonuclear double bond energies going down Group 14. Use...

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Chemistry

Spartan Lab Questions:

1. Discuss the trend in homonuclear double bond energies goingdown Group 14. Use the HOMO‑LUMO gaps that you have determined tofacilitate your discussion. Are there significant differences inthe MO diagrams for ethene and digermene?

2. Compare the HOMOs and LUMOs of ethane and digermene. Whatdoes the distribution of electron density tell you about theorbitals?

3. Simple alkenes are colorless, but disilenes and digermenesare intensely colored. Explain.

4. All isolated disilenes, digermenes and distannenes have verylarge substituents, such as t-butyl or TMSgroups.[1] How do large substituents lend 4.greater stability to these compounds?

5. What evidence do the authors in reference 6 give thatdemonstrates just how weak the “double” bonds in heavier analogs ofethane are?

6. How does the symmetric stretching frequency relate to bondstrength?

7. Recently, the first ever compound with a Si-Si triple bondwas structurally characterized.[2] Contraryto what is observed for alkynes, the compound displays a nonlinearR-Si-Si-R geometry. Based on your findings in lab, is this asurprise? Rationalize the bonding using a simple valence bondmodel.

please answer any that you can!

Answer & Explanation Solved by verified expert
3.8 Ratings (389 Votes)
1 The group 14 elements areCcarbonSisiliconGegermaniumSntinPbleadFl fleroviumand the respective bond energies in kJmol are 603274195169164standars data from SCI literature Homonuclear bond is thecovalent bond between two identical moleculesIf two HOMO orbitalsreact then two new MOs will be obtained one lower and one higherin energy and The only energy gain is when a HOMO from onemolecule reacts with a LUMO from the other molecule The comparisonof bond energies shows the level of decrease on moving down its dueto the strength of HOMO energy excitation to LUMO for example CCbond is always higher so only diamond is much stronger C oncomparing with other atomsmoleculesDigermene H4Ge2 and EtheneC2H4 yes there is significant    See Answer
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