課程名稱︰無機化學
課程性質︰系訂必修
課程教師︰王瑜
開課學院：理學院
開課系所︰化學系
考試日期︰2006年1月17日
考試時限：120分鐘
是否需發放獎勵金：是
試題 :
Inorganic Chemistry Jan.17,2007
1.Briefly describe the acid-base concepts of Bronsted; Lewis; Frontier orbitals
and hard soft acid base.
2.I2 vapor is purple with an absorption band around 520 nm; however there is an
extra band at 225 and 300 nm when it is in hexane and in benzene
respectively. Explain.
3.Place the order of which one reacts more strongly with CO for Fe; Fe(Ⅱ);
Fe(Ⅲ) and explain why?
4.Use HOMO-LUMO diagram to illustrate the hard-hard and soft-soft acid base
interactions.
_
5.Write down the MO of NO ion and predict the product (HON or HNO) when it is
reacted with H(+), give your reason.
6.KNiF3 belongs to Peruvskite structure type(primitive cubic with a=0.40 nm)
with K at (0,0,0); Ni at (1/2,1/2,1/2) and F at (1/2,1/2,0);(1/2,0.1/2) and
(0,1/2,1/2). i)what are the coordination numbers and coordination
geometries for K, Ni and F respectively? ii)What are the inter-atomic
distances of Ni-F; K-F; K-Ni? iii)Calculate the density of this crystal.
(atomic weight: K:39;Ni:59;F:19 g/mol; N(avo)=6.02×10^23)
7.Take Li metal as an example, illustrate the MOs of Li(n) when n=2,3,4,5 then
to ∞ and forms 2s band for Li(∞), is it an insulator; a semi-conductor or a
good conductor? Why?
8.Briefly describe the diode behavior with semi-conductor of p-n junction.
Extend your explanation to the principles of photovoltaic cell and light
emitting diode(LED).
9.KrF2 is crystallized in body centered tetragonal with two molecules in the
cell and with F-Kr-F angle of 180 degrees, how would you place the molecule
into the cell? which direction does the molecule aligned to?
10.State all possible nitrogen oxides, give respective molecular structure and
the oxidation state of nitrogen.
11.Give the most commonly observed P and S forms; give also their oxides and
describe all the structures in proper point group symmetries.
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