Detailed calculations show that the value of Z e f f for the outermost electrons in Si and Cl atoms is 4.29 and 6.12 +, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Z e f f using Slater's rules? (c) Which approach gives a more accurate estimate of Z e f f (d) Which method of approximation more accurately accounts for the steady increase in Z e f f that occurs upon moving left to right across a period? (e) Predict Z e f f for a valence electron in P, phosphorus, based on the calculations for Si and Cl.
Detailed calculations show that the value of Z e f f for the outermost electrons in Si and Cl atoms is 4.29 and 6.12 +, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Z e f f using Slater's rules? (c) Which approach gives a more accurate estimate of Z e f f (d) Which method of approximation more accurately accounts for the steady increase in Z e f f that occurs upon moving left to right across a period? (e) Predict Z e f f for a valence electron in P, phosphorus, based on the calculations for Si and Cl.
Detailed calculations show that the value of Zeff for the outermost electrons in Si and Cl atoms is 4.29 and 6.12 +, respectively. (a) What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl by assuming core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant? (b) What values do you estimate for Zeff using Slater's rules? (c) Which approach gives a more accurate estimate of Zeff(d) Which method of approximation more accurately accounts for the steady increase in Zeffthat occurs upon moving left to right across a period? (e) Predict Zeff for a valence electron in P, phosphorus, based on the calculations for Si and Cl.
CH3
CH
H3C
CH3
H
OH
H3C-
-OCH2CH3
H3C
H
-OCH3
For each of the above compounds, do the following:
1. List the wave numbers of all the IR bands in the 1350-4000 cm-1 region.
For each one, state what bond or group it represents.
2. Label equivalent sets of protons with lower-case letters. Then, for each 1H NMR
signal, give the 8 value, the type of splitting (singlet, doublet etc.), and the number
protons it represents.
of
letter
δ value
splitting
# of protons
3. Redraw the compound and label equivalent sets of carbons with lower-case
letters.
Then for each set of carbons give the 5 value and # of carbons it represents.
letter
δ value
# of carbons
Draw the correct ionic form(s) of arginine at the pKa and PI in your titration curve. Use your titration curve to help you determine which form(s) to draw out.
Chapter 7 Solutions
Laboratory Experiments For Chemistry: The Central Science, Si Edition
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