12 Questions 14 Answers 0 Followers
Questions related from Julián Sánchez
Hello, dear Scientists I would like to know why in some cases, if you impregnate metal in a support (in different percentages, e.g.: 1%, 2%, 4%) the surface area of the final material do not...
10 October 2019 7,553 5 View
Hello everyone, I would like to know if someone have a reference or a possible explanation about if ketones (2-propanone or ethyl acetate) could coordinate to iron (metal or cation)? Since...
09 September 2019 1,429 4 View
Hi dear scientists! I am trying to find a transition state using QST2 and rob3ylp 6-31g(d,p)... Nevertheless, in all cases my run fails.. The next paragraph appear in my file.log: "Old...
02 February 2019 2,058 7 View
Hi dear Scientists! :) I was impregnating Fe or Cu over different mesoporous materials, and after TPDA analysis I concluding that when I decrease the percentage of metal over surface of...
11 November 2018 1,315 5 View
Hi everyone, I just have a problem to determine the amount in mili o micro moles of pyridine adsorbed in a material. I only have results of area of pyridine from company that they did the...
07 July 2018 9,241 1 View
Hi everybody! I have a partner in the laboratory that don't believe me (Miguel at Antioquia University- Colombia) about what is the difference between intermediate and intermediary? Is it...
04 April 2018 3,504 3 View
Hi scientists! I have a question related with the acidity of MCM-41 and SBA-15. I know that both supports present a low acidity (that could be verified by TPD of ammonia). But, I would like to...
04 April 2018 6,533 0 View
Hi Scientists!! I am trying to choose the best model in a experimental arrangement of four factors and three levels. I don't know what model is more correct? I chose Box-Behken but I am thinking...
10 October 2017 1,221 11 View
I was reading about this interesting topic and I don't understand what could be the more stable kind of hydrogen. This could influence the storage of hydrogen? Thanks a lot, Julián S.
09 September 2017 4,772 2 View
Hi, I'm trying to explain the formation of the final compound in the reaction of alpha pinene epoxide with ethanol, a very interesting topic in the formation of add-value chemical substances. I...
08 August 2017 10,108 4 View
Hi everybody, Actually, I am simulating some process using Gaussian G09, specifically some molecules adsorbed over silica. But, I don't know how to explain if Gaussian works in gas-phase, what...
03 March 2017 9,235 4 View
Hi everybody, I have a problem with my input file to run a transition state in gaussian (G09). When I try to run my file, the output file present this problem " ***** Convergence failure in GTrans...
12 December 2016 7,948 2 View
