Both nitrogen and phosphorus belong to group 15 of the periodic table;thus, the same chemical and...
Both nitrogen and phosphorus belong to group 15 of the periodic table;thus, the same chemical and physical properties are expected for both elements. However, organic phosphines (R3P, R = alkyl or aromatic group) easily oxidize to phosphineoxides (R3P=O), while amines (R3N) do not. Why?
Homework Answers
In phosphine oxide, phosphorus has formed 5 bonds and has 10 electrons in its valence shell.
These electrons are accomodated in 3s,3p and 3d of Phosphorus atom.
Similar compound is not possible in case of nitrogen because, nitrogen lacks d orbitalsin its valence shell, it has only 2s and 2p orbitals in valence shell. Hence, it cannot extend its valency to five.
Thus, amineoxides with formula R3N=O are not possible.
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Both nitrogen and phosphorus belong to group 15 of the periodic
table;thus, the same chemical and...
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why do I use dried hexane? what does it do?
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why do I use dried hexane? what does it do?
Keywords: phosphorus-chlorine bond; organophosphin Techniques: various techniques are summarized in the Technique Tips section of the ure to read through the relevant ones before starting t be found in the appendices on the course website web site. Be the experiment. Useful information can also Phosphorus has the common oxidation states of III and V and it is known to form an extensive rang of organic compounds in both oxidation states....
PART I: HYDRIDES AND PERIODICITY Table 10-1. Lewis structures of hydrides Formula Total # of Valence Central Atom of Hydride Electrons Lewis Structure S aloon loro p ro bono di non auto Sad Ind o nesboro both bobom Table 10-2. Molecular geometries w of Lone Electron Electron-Pair Pairs Geometry Central Atom # of Bonded Electron Pairs Formula of Hydride Bond Angles) Molecular Shape ci TA's Initials PART II. FLUORINATED COMPOUNDS Table 10-3. Fluorinated compounds Total # of E. Pairs around...
____ 1. The diagram below represents serine, a polar, uncharged
amino acid. Which functional group gives serine its
distinct property?
a. H3
b. CH2OH
c. –H
d. COO–
____ 2. The monomers shown below are monomers for which of the
following natural polymers?
a. polysaccharides
b. plastics
c. DNA
d. proteins
____ 3. Which of the following processes illustrates the production
of a protein?
a. specific code for amino acids --> amino acid chain -->
gene --> DNA --> specific...
**(left structure)****(right
structure)**
The two structures for the assignment are above and
the task is:
1. Perform a retrosynthetic analysis on the two target
molecules assigned to you. In each case the organic
starting material (what you have to work backwards toward) depends
upon the target. For the structure given above (structure on left),
the starting material is either malonic ester or acetoacetic ester
and any halide. For the structure given above (structure on right),
the starting material is any...
can
someone help me find this information?
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab to determine the identity of the polymer samples 2. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 3. Write the name and abbreviation for the six recyclable polymers 2 huetn deisity polyetayene.HDpz poulene: PP 4. Given the list of wavenumber...
please help
Question 23 (1 point) Which observation is NOT explained by the intermediate disturbance hypothesis In the interior of an old forest a low number of K-type species dominate the community Species evenness is larger when disturbances are extremely frequent Species richness increases immediately after a disturbance such as a fire, but may decrease later In beach dune environments, a low number of r-type species dominate the community Question 24 (1 point) Some birds follow moving swarms of army...
QUESTION 3 The textbook discusses 3 types of environmental degradation affecting the environment. Below, please match each type of degradation discussed to the type of consequence suggested in the textbook. (Answer based on what the book says, not based on your personal opinion.) Air pollution A., is killinig humans 8,..isklin the earth Land poliution Water pollution address chiticar Watel Air Pollution Air pollution occurs when the release of materials to the atmosphere cannot be safelv disposed of by natural processes....
What are the instruments that have been utilized for the
review article discussions?
`
1. Introduction In recent years, nanoclays have been the object of particular interest for many scientists and researchers in chemistry, physics, engineering and biology due to their excellent properties as well as their sustain- ability [1-3]. For instance, they represent the starting point to the de velopment of smart materials for drug delivery (4-9), food packaging [10-12), environmental remediation and wastewater treatment [13], cultural heritage [14–17and...
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