Questions tagged [boron-family]
For questions about the elements of the boron family (group 13), their compounds, and their physical and chemical properties.
34
questions
2
votes
1
answer
191
views
What is the correct method for converting a concentration given in ppm to molarity?
I need to convert a concentration of dissolved boric acid $(\ce{H_3BO_3})$ in water (at high temperature and pressure) from ppm to mol/L.
Concentration of boric acid: $c_{ppm}=1500\ \ce{ppm}$
Molar ...
- 137
-4
votes
1
answer
149
views
Bonding in boron icosahedra [closed]
How do boron atoms make five bonds with other boron atoms even if the electron configuration of unbound boron atoms is [He]2s²2p¹, i.e. there is an insufficient number of outer electrons? Are the ...
- 135
0
votes
1
answer
35
views
Inhibitors of hydration
Superglue (Cyanoacrylate) polymerizes via hydration, and using an activator such as a borax solution speeds up that process. I need to mix these 2 without them reacting. (Or at least not noticeably.)
...
- 155
1
vote
2
answers
398
views
Does boron exhibit +1 oxidation state?
My teacher told that boron exhibits only a $+3$ oxidation state, but he also wrote the unbalanced reaction
$$\ce{B + C -> B4C}.$$
Carbon has greater electronegativity than boron leaving us with $\...
- 31
3
votes
0
answers
90
views
How to decide whether diborane undergoes symmetric or asymmetric cleavage?
How does one decide whether diborane undergoes symmetric or asymmetric cleavage, given the lewis base which attacks it. Is it possible to ascertain this theoretically?
Sterics is mentioned as the ...
- 1,399
0
votes
1
answer
268
views
What can happen to overheated aluminum cookware?
I accidentally overheated an aluminum espresso maker, to around 250-300° C in my estimation, but it might be even higher - I didn't measure, though. After research, I found that the material used is ...
1
vote
1
answer
583
views
Why do boron salts impart a characteristic green colour to the flame
In salts of boron it exists as a cation in the B(III) form. It is known to impart green colour in several of its salts like borates, boron triflourides, boric acid etc. If there are no electrons in ...
- 1,399
1
vote
0
answers
172
views
Heating effect on Orthoboric Acid
I am a high school student and was studying about the effects of heating orthoboric acid, and I saw two textbooks putting different statements.
One book says,
On heating above 370K, orthoboric acid ...
- 546
-1
votes
2
answers
451
views
Why does boron form only covalent compounds? [duplicate]
I got two options,
The size of $\ce{B^3+}$ ions, is very small and the ion has high charge density. Thus, following Fajan's rule, boron forms covalent compounds.
The sum of the first three ionisation ...
- 546
1
vote
1
answer
83
views
Does adding NH3 to an HCl solution facilitate the dissolution of aluminum compounds?
If we compare the two solutions hereafter, which one would better leach/dissolve aluminum metal/compounds present at/near the inner surface of the glass:
Solution A: $10\,\%\, \ce{HCl + H2O}$
Solution ...
- 1,065
0
votes
0
answers
40
views
Reactivity of boron nitride BN, reaction with Cl2
lately I've been interested in chemistry of boron and it's properties.. and I am looking for more information. For example I can't really seem to find lot of information about boron nitride BN other ...
0
votes
2
answers
596
views
How to get the coordinates of β12 borophene and χ3 borophene?
Can someone tell me how to draw the β12 borophen and χ3 borophene in Materials Studio or any other software? I've just started my project work, and I'm a beginner in this field.
I have searched for ...
- 181
1
vote
1
answer
90
views
Exactly how the subscripted numbers are given to the different types of boron sheets (borophenes)?
I was going to start a project on Borophene, and hence I was going through a review journal, 2D Boron: Boraphene, Borophene, Boronene, where they have said many types of borophenes had been proposed. ...
- 181
4
votes
2
answers
179
views
What is the rationale for calling something as an 'inorganic [organic compound]'?
While studying the main groups of p-block, I have seen many compounds being labeled as an analog to some popular organic compound. For example, borazine is termed as 'inorganic benzene', while boron ...
user95829
5
votes
1
answer
1k
views
Does boron form compounds without covalent bonds?
I have read that boron, due to the very high sum of its first three ionization energies, it is not able to form its +3 ions, and thus it generally forms only covalent compounds. But in a popular ...
- 1,198
0
votes
0
answers
51
views
Why is boron inert to acids and bases? [duplicate]
I was reading my school text book and in the segment related to the reactivity of group 13 elements with acids and alkalis it was written:
Boron does not react with acids and alkalis even at moderate ...
0
votes
0
answers
99
views
Aluminum Monoacetate Solubility in Aqueous Medium?
Does anyone have access to the aqueous solubility value of aluminum monoacetate?
I would expect it to be slightly soluble but I've searched the internet and haven't found any solubility values. : /
- 1,065
-4
votes
2
answers
76
views
Acid boric preparation [closed]
Is there a simple reaction to yield boric acid ($\ce{H3BO3}$) from boron trifluoride ($\ce{BF3}$)?
4
votes
1
answer
744
views
Electrophilic substitution on Borazole
As Borazole ($\ce{B3N3H6}$) is aromatic, it can show electrophilic aromatic substitution. Now, my question is when borazole undergoes electrophilic aromatic substitution reaction, on which atom does ...
- 1,383
-1
votes
1
answer
698
views
What is the hybridisation of the bridging oxygen atoms in the borax anion?
Below is a neat looking borax anion.
While exploring the molecule in a computer simulation (Gaussian 16, level of theory: HF/3-21G), I found that the oxygen atoms in the 8-membered outer ring had sp2 ...
user96208
-2
votes
1
answer
348
views
Hydrolysis of magnesium boride
Does magnesium boride react with water to form boranes?
My attempt:
Magnesium nitride reacts with water to form ammonia and magnesium hydroxide.
Similarly, does magnesium boride also react with water ...
0
votes
2
answers
360
views
Acidic nature of boric acid when its concentration high
Following statement was given for boric acid $(\ce{H3BO3}):$
At low concentrations $(\leq\pu{0.02 M})$ essentially $\ce{B(OH)3}$ and $\ce{B(OH)4-}$ are present, but at higher concentration the ...
- 1,340
3
votes
1
answer
544
views
Structure of crystalline boron trioxide
I recently came across the statement
The structure of crystalline $\ce{B2O3}$ consists of $\ce{BO4}$ tetrahedra, two sets of which form two types of interconnected spiral chains, three $\ce{B-O}$ ...
- 1,340
3
votes
1
answer
2k
views
Why are bridge bonds weaker than terminal bonds and, H-B-H terminal bond angles larger than H-B-H bridging bond angles in diborane? [duplicate]
In Concise Inorganic Chemistry by J.D.Lee (Adapted by Sudarsan Guha, Fourth Edition), on page 83, under the topic "Bridge Bonding" it is given for diborane $(\ce{B2H6}):$
The $d_\ce{B-H}(\...
- 2,022
4
votes
0
answers
3k
views
Why are B-O-H and B-O-C angles in B(OH)3 and B(OCH3)3, respectively are higher than normal?
In Concise Inorganic Chemistry by JD Lee (4th edition; adapted by Sudarshan Guha), page 77 under the topic "Back Bonding" it is given:
The $\mathrm{2p}\pi$-$\mathrm{2p}\pi$ back bonding in $\ce{B(...
- 2,022
0
votes
0
answers
105
views
Creation of BF3 from B2O3 [duplicate]
Why can't you prepare Boron Trifluoride by reacting B2O3 with Carbon and Fluorine?
B2O3 + 3C + X2 ---> 2BX3 + 3CO
Why won't this work with Fluorine?
(This is not a duplicate, as the question being ...
-1
votes
1
answer
773
views
Which is more metallic: boron or silicon?
I read somewhere that boron is more metallic. Is it correct? If so, can you please elaborate?
The reason why I'm confused is because 2 factors come into play here:
When you move towards right, ...
13
votes
2
answers
4k
views
Can ethylene glycol enhance the acidity of orthoboric acid?
My textbook says:
Boric acid is a weak monobasic acid but on the addition of certain organic polyhydroxy compounds, such as mannitol, glycerol, dextrose or invert sugar, it is transformed into a ...
1
vote
2
answers
1k
views
Oxidation states of boron
I have just been looking at https://en.wikipedia.org/wiki/List_of_oxidation_states_of_the_elements and found that boron has a -5 oxidation state. I would like to know which boron compounds form ...
- 73
7
votes
2
answers
3k
views
Why is the electronegativity of indium greater than that of thallium?
Why is the electronegativity of indium greater than that of thallium?
One possibility which I had assumed was the poor shielding effect by the d and f orbitals which leads to an increase in the ...
- 71
4
votes
0
answers
106
views
Structure of trichloroborazine
I came across a question that asked the correct structure of trichloroborazine. The two options provided were :
a) the chlorine atoms attached to the three N atoms, and
b) the chlorine atoms ...
- 49
6
votes
0
answers
1k
views
Why isn't orthoboric acid soluble in cold water even though it has polar B-OH bonds?
This is the information I found regarding orthoboric acid's solubility:
Textbook (NCERT India): Sparingly soluble in water (didn't say what temperature - presumably cold) and highly soluble in hot ...
- 365
9
votes
3
answers
3k
views
Dipole moment and polarity of borazine / borazole / inorganic benzene
What is the dipole moment of borazine? I tried googling it but can't find a reliable source. I searched in JD Lee too. It might have it but I could not find.
- 199
14
votes
4
answers
37k
views
Why does screening effect decrease due to d-orbital?
In 13th group, atomic radius increases from boron to aluminium. From aluminium to gallium, atomic radii decreases. From gallium to indium, atomic radii increases. And from indium to thallium, atomic ...
- 5,057