Exam+1+--+Fall+2005+--+ANSWERS+_do+not+distribute_-1

Exam+1+--+Fall+2005+--+ANSWERS+_do+not+distribute_-1 - Name...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
(A) Phosgene is a substance that is used in preparing many important organic molecules, such as the pharmaceuticals used to treat diseases. Phosgene also has had a more ominous use as a chemical warfare agent during WWI. The molecular formula and implied connectivity of phosgene is CI2CO. Draw a complete Lewis structure for this molecule that is made up of uncharged, closed shell atoms, including necessary non-bonded electrons. Name Page 1 (F.05.2l0Elpl) Lewis structure for phosgene: CI2CO 11{} p*rtia| 'cl I 'cl . -t , (B) A structurally similar compound to phosgene is called formaldehyde, a preservative whose distinctive odor you might recall vividly from high school biology classes. The molecular formula and implied connectivity of formaldehyde is H2CO. 3-D orbital drawing for H2CO H. /' K|5\ // H\. tx) T"tarti*tl (C) Wtricfr of these acids would be predicted to be able to completely protonate the conjugate base . of phenol (called phenoxide), shown here? Please an "X" in the box corresponding to each acid (a) Using lines, dashes and wedges to represent the direction of sigma bonds and localized non-bonding electron pairs, and overlapped p-orbitals for pi bonds, draw a three-dimensional orbital picture for formaldehyde. ?'1r Hrc-c-o aa (cH3)2NH place an "X" to indicate which acid(s) can completely protonate phenoxide; no partial credit 1p) (a) Silicon atoms,like carbon atoms, are often tetravalent. One example of this is SiFa, silicon tetrafluoride. Using lines, dashes and wedges to represent the direction of sigma bonds and localized non-bonding electron pairs, and overlapped p-orbitals for pi bonds, provide a three-dimensional representation for SiFa (you do not need to show the anticipated geometry of non- bonded electron pairs). (b) Unlike carbon, silicon is a third-row element that can form structures with expanded shells (beyond
Background 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
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 5

Exam+1+--+Fall+2005+--+ANSWERS+_do+not+distribute_-1 - Name...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online