20 Questions 4 Answers 0 Followers
Questions related from Nesa Jafarzadeh
If we want to introduce a material similar to polymethyl methacrylate "with the characteristics mentioned in the next paragraph" that can be added to a precursor and create a composite, which...
04 July 2024 2,342 1 View
Are the most stable Chelate rings 5 or 6 rings? For example, in the Co(OO)3 complex.
02 February 2023 4,600 0 View
If we have a crystal with a coordination number of five, triangular bipyramidal(TBP) and square pyramid(SP) are expected. An intermediate state may also be obtained due to Barry's pseudo-rotation....
01 February 2023 8,189 2 View
What is the main difference between rhombic twist and trigonal twist and berry pseudo rotation? If we have a complex like [Co(en)3]3+, how can we understand the main rotation between isomers?
01 February 2023 5,188 0 View
Hello dear researchers By raising the pressure, does the size of the crystals get bigger? In general, how is the effect of pressure on the rate of crystal production?
30 January 2023 1,341 2 View
Can the HOMO orbital be higher in energy than the LUMO in the molecular orbital diagram? What is the reason for that? And can the LUMO orbital not be empty
30 January 2023 5,711 0 View
I'm confused! In 13CNMR spectroscopy, is 13C nucleus used in the device? What exactly is the nature of the magnetic field produced by the device? From carbon 12 or 13? And does it only stimulate...
29 January 2023 9,005 1 View
In what way and when add alumina to our solution of complex in solvent? ( I understood my crystal was acidic with X-ray single crystallograghy and I don't want it. I want a new one with neutral...
27 March 2022 4,679 2 View
I mixed sodium azide with organotin complex(simple complex) and after that the solvent was evaporated by rotary. After that I was added n-hexane to this oily liquid and in the next part I was...
01 January 1970 7,619 0 View
Can main group 2 metallocenes be polymerized? By what mechanism may a metallocene form a polymer? Steric effects do not create a problem for the polymerization of these compounds?
01 January 1970 8,083 1 View
In XRD, I think there is a significant relationship between the target and the filter here, and the target has one more proton than the filter, is this true or false? What is the reason in both cases?
01 January 1970 5,267 1 View
Is the Big Bang really obsolete? If it is obsolete, what is the new theory? The experiment that was tested in the Swiss laboratory is called LHC, so what will happen? If the Big Bang is true,...
01 January 1970 5,992 2 View
Do we have a simple hexagonal structure? If so, what examples are there?
01 January 1970 4,968 3 View
Experiments and studies have determined that Neanderthals existed before Adam and Eve. Darwin's theory of evolution is still used, isn't this a contradiction? According to religious teachings, the...
01 January 1970 3,529 1 View
Why was there no other dominant and efficient method in the industry to produce ammonia after Haber's process? what is the reason? Haber's process is performed in very difficult conditions, but it...
01 January 1970 2,825 1 View
When I was going to school, I asked the biology teacher a question, but he couldn't give an answer, and he said it was a good question, but I don't know the answer, go ask someone else because it...
01 January 1970 3,044 0 View
What is the world like? Are the universe and galaxies arranged in a special way? How many dimensions is our world? I read in an article that the world is cylindrical and has 11 dimensions! Is this...
01 January 1970 8,010 0 View
According to this slide WH7(PMe3)3+ is not possible, how many hydrids change to dihydrogen? and after this change is this complex obey 18 ē EAN role? - I calculated before but don't found...
01 January 1970 2,312 0 View
Why Mg centre is bent in some photos and linear in anothers? "in CH3CH2MgBr" Which of these items acceptable ? Why? Mg has just 2 electrons in valance shell, why this centre can be bent?
01 January 1970 1,889 0 View
Why does the alpha ray not penetrate the paper? In the same way, why doesn't beta ray pass through aluminum plate, X-ray and gamma ray pass through lead plate and neutron radiation pass through...
01 January 1970 1,269 3 View
