These are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

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Shape Of Cetyl Alcohol

Why is cetyl alcohol bent at the 9th position?
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1answer
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Explanation of certain chemical bond diagrams

Here's a "simple" bond diagram of 1,1,1,2-Tetrafluoroethane which I believe is a Lewis structure: Ok, that's easy enough - four bonds from each Carbon atom, and each Fluorine atom having one bond. ...
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Meaning of 1,1,1,2 in 1,1,1,2-Tetrafluoroethane & similar

What is the meaning of the 1,1,1,2 part in the compound 1,1,1,2-Tetrafluoroethane, a refrigerant commonly known as R-134a, some info: Formula: $\ce{CH_2FCF_3}$ Structure: Reference: ...
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2answers
109 views

Why $\ce{MgSO4.\color\red{7}H2O}$?

I was wondering why specific number of water molecules are attached to salts like $\ce{CuSO4.5H2O}$? Searching gave me a satisfying picture : I think $\ce{FeSO4.7H2O}$ should have a similar ...
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1answer
397 views

How could scientists produce accurate chemical structures before they could capture images of molecules?

How were scientists able to produce these accurate structural diagrams long before scientists were able to capture images of the actual molecules? Reference: Scientists capture first images of ...
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3answers
62 views

Oxalic acid structure

Can you tell me the reason why oxalic acid has its 2nd -COOH group flipped? I'm guessing its something to do with steric replusions between the -cooh group im not sure.
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1answer
154 views

Structure of Fe1C13H10O2

The reaction of $\ce{(C5H5)Fe(CO)2Cl}$ with an equimolar amount of $\ce{Li+[C6H5]-}$ gives a product. Draw its structure and apply the 18 electron rule. In a question I was given the ...
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2answers
69 views

Determine which molecule has stronger intermolecular force?

SiH4 and CH4 The only intermolecular force they both have is London Dispersion forces Strength of LDF is determined by molar mass molar mass of SiH4 = 32.132 molar mass of CH4 = 48.42 Therefore ...
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81 views

Why is the orbital angular momentum of a pi electron along the axis of two atoms' molecule one?

I'm reading quantum chemistry. The book says that the orbital angular momentum of a $\pi$ electron along the symmetry axis of a molecule made up of two atoms is $\pm 1$. I think this is a primary ...
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1answer
38 views

How does the activity of Sn chemical potential vary as a function of composition at 900 C?

This is referring to the Cu-Sn phase diagram in which composition varies along a horizontal line at a certain temperature. I understand that as you move along that line different intermetallic or ...
2
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1answer
75 views

Why aren't there 8 double bonds in s8?

I know that s8 molecule contains 16 pair of lone electrons. My teacher always says that we must try to reduce the no of lone pairs, so, had there been double bonds between 8 atoms of sulphur then the ...
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1answer
329 views

Gold's atomic structure and bonding in relation to the separation techniques used

How is Gold's atomic structure and bonding related to the separation techniques used to distinguish it from other substances? I'm just confused on what I'm actually searching for, I have read so ...
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1answer
57 views

Why is this organic compound trans, and not cis?

I'm reading a high school chemistry course online, and I'm now reading about geometric isomers. They provide this example: And in terms of naming it, they say this: Begin by identifying the ...
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1answer
33 views

Does it matter which end of a chain one sets to be 1 when drawing the structure of organic compounds?

For example, if I were to draw the structure of 1,2,4-trimethylcyclohexane, then would one or both of these be wrong? Or are both right? I'm wondering if it matters where I start to count from 1 in ...
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2answers
567 views

Iodate ion (IO3-). Is it polar or non-polar?

I am trying to figure out the shape of the iodate ion or $\ce{IO3^-}$. No matter how many times I draw it, I keep getting Iodine in the centre, and 3 oxygen atoms surrounding it, 2 with single bonds, ...
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1answer
77 views

Why doesn't EDTA have a double bond?

EDTA (Ethylenediaminetetraacetic acid) has a structure like this But why, as the name 'Ethylene' suggests, doesn't it should have a double bond between carbons?
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Can anyone identify this uncaptioned diagram?

It's from the start of part 3 / chapter 19 in Lewin's Genes X (see this page in Google Books)... Looks a bit like a Ramachandran plot(?) but the axes only go to 100 / 70ish, but I don't even know ...
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1answer
157 views

Tools to draw molecular structure (wireframe) along with atom numbering

I am looking for open-source tools which can generate 2d molecular structure from the MOL or SMILES file. Further, it SHOULD number the atoms in the order of occurrence of atoms in the connection ...
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3answers
165 views

When should we not draw a Lewis dot structure?

My friend once told me that technically , we should not draw Lewis dot structure of molecules containing no central atom.(eg.benzene,acetic acid) Is he right ? If yes, then what is the reason behind ...
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1answer
2k views

Lines on inside of hexagonal shapes of structure diagrams

just a simple question from me today... I was looking at the structure of Norepinephrine for a school project and was curious about the diagrams on the Wikipedia page for it. I was wondering why ...
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2answers
242 views

How to draw Lewis dot structures?

What is the most logical and easy to remember step by step method for drawing Lewis dot structures? I'm having trouble drawing a simple one for $CO_2$.
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1answer
159 views

Chemical diagram for cummingtonite?

Any suggestions on diagramming the chemical structure for cummingtonite? $$ (Mg,Fe)_7 Si_8 O_{22} (OH)_2 $$ As I understand it, the $(Mg,Fe)_7$ says the molecule has seven atoms that could be either ...
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2answers
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Why does sulphur and oxygen form sulphur dioxide?

Sulphur has 6 electrons in its outermost shell, while even oxygen has 6 electrons in its outer shell. Since both need just 2 electrons to stabilize, why doesn't just one atom of oxygen react with one ...
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1answer
317 views

Derivation of formula for Degree of Unsaturation

Degree of Unsaturation(DU) of an organic compound tells us about the total number of $\pi$ bonds(both double bonds and triple bonds) and number of rings/cyclic chains in the compound. Degree of ...
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248 views

Bent molecular geometry of water

Could you please explain how the bent molecular geometry of water is due to hydrogen bonding? I was under the impression that it was because of the lone pairs (VSEPR Theory).
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161 views

What is the specific structure of Poly(allylamine hydrochloride) $(C_3 H_7 N)_n HCl$?

I'm working with Poly(allylamine hydrochloride), and I found that the chemical formula is $$(C_3 H_7 N)_n \cdot HCl$$ But I need a diagram like THIS But more explicit. I mean with the carbons, where ...
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1answer
279 views

What sort of molecules or polymers are used in OLED displays?

OLED displays have been emerging as competitors for LCD displays for some time and are now common in mobile phones (see comparison of a Google Nexus 1 and an iPhone here) The displays use small ...
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1answer
346 views

Electron dot structure of an alkyne

I am trying to determine the electron dot structure of of an alkyne like $\small\ce{C2H2}$ I know that hydrocarbons with at least one carbon-carbon triple bond are called alkynes, and their general ...
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5answers
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What is the chemical structure of H₂SO₄?

I was looking at the chemical structure of H2SO4. Intuitively, I would have expected this molecule to be square planar in a p2d2 or sp2d geometry but rather, it is shown to be in an tetrahedral ...
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4answers
395 views

Is the order of orientation of electron box diagrams meaningful or arbitrary?

Here is my interpretation when asked to: By drawing arrows in the appropriate boxes, complete the outer electron structures for Cu and Cu2+ I had no problem in drawing out the electron ...
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1answer
290 views

What is the difference between an angular and linear skeletal formula?

When drawing a skeletal formula, what is the difference between an angular version and a linear version? I was asked to draw the Z isomer of Resveratrol: For which I drew: However the ...
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1answer
137 views

Why is it that the bigger the side-chain is, its hydrogen atoms tend to be more equatorial?

The most stable cyclohexane form is the chair conformation but on the other hand, the bigger the side-chain of the cyclohexane is, its hydrogen atoms become more equatorial rather than axial, which ...
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Why are arenes with conjoined benzene rings drawn as they are?

Whilst we are taught to represent benzene as below (A) due to its delocalised electrons, however when two benzene rings share carbons (e.g. naphtalene) it seems to be more commonly represented in ...