![]() ![]() G, AÂ♺, sheared GÂ♺ and other mismatch pairs. ![]() Specifically, the pulse sequence H2( N1 N3) H3 correlates H2(A,ω 1 ): H3(U,ω 2 ) protons across Watson-Crick A-U and mismatched GÂ♺ base pairs, the sequences H5( N3 N1) H1/ H6( N3 N1) H1 correlate H5(C,ω 1 )/ H6(C,ω 1 ): H1(G,ω 2 ) protons across Watson-Crick G-C base pairs, and the H 2 ( N2 N7) H8 sequence correlates NH 2 (G,A,C ω 1 ): H8(G,A ω 2 ) protons across G To address these problems, we present pulse sequences to obtain direct, internucleotide correlations between protons in uniformly 13 C/ 15 N labeled nucleic acids containing N d  For many situations this is a non-trivial task which is further complicated by poor dispersion of ( N a, N d ) resonances. HN a bonds, the receptor nitrogen needs to be assigned in order to unambiguously identify the hydrogen bond.In 2 H J NN -COSY experiments, which correlate protons with donor/acceptor nitrogens across N d  Majumdar, Ananya Gosser, Yuying Patel, Dinshaw J. International Nuclear Information System (INIS) the classical bonding.ġ H-1 H correlations across N-H Thus, at n = 4, multicenter bonding wins the tug-of-war vs. ![]() It was found that H-(Be)2- H and H-(Be)3- H clusters are linear with classical two-center two-electron bonds, while for n > 3, three-dimensional structures are more stable with multicenter bonding. Chemical bonding analysis was performed with the Adaptive Natural Density Partitioning method. Global minimum structures were found using machine searches (Coalescence Kick method) with density functional theory. ![]() Quantum chemical calculations were performed for beryllium homocatenated compounds. Tug-of-war between classical and multicenter bonds in H-(Be)n-H species ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |