7 Questions 185 Answers 0 Followers
Questions related from Alfred Ross
Dear NMR experts, I am looking for a reference with information on the dependence of the chemical shift of typical NMR solvents if varying amounts of acid (e.g. HCl, TFA, MSA...) are present in...
28 August 2024 1,385 2 View
Dear Scientists and Experts, is there an "simple" (e.g. calculating aromatic overall surface, charges,....) approach to ESTIMATE the anisotropy of the diamagnetic susceptibility of an organic...
23 May 2023 3,592 0 View
Der NMR colleagues, How can one discriminate NH2 from NH3+ reliably by use of solid-state NMR. The difference in 15N chemical shift due to protonation is often smaller compared to changes induced...
07 February 2022 6,249 13 View
Dear NMR colleagus, as a novice in solid-state NMR I dare to aks whether the three methyl groups of a tert-butyl moiety in a organic molecule may show distinct NMR signals in a 13C CP-MAS...
19 February 2016 7,597 4 View
I am looking for somebody who has experience in the use of 33S solid-state NMR for the determination of the protonation state of a sulphate counterion of a "salt" of a drug molecule in a...
27 June 2014 4,435 2 View
Definitely purely academic: I recently saw an article on NMR of 99Tc which is spin 9/2. For this nucleus, there exists an excited state which is called 99mTc. This state decays by gamma-emission...
19 March 2014 2,830 5 View
I am looking for a laboratory which has a 500 or 600 MHz Bruker NMR machine without digital filtering. I would like to send you one liquid sample in a NMR tube for a quick 1D NMR measurement which...
07 May 2013 1,979 3 View
