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oai:mountainscholar.org:10217/2442382026-04-23T11:06:51Zcom_10217_100532com_10217_100000com_10217_100367com_10217_100303col_10217_100538col_10217_100368

Kuester, Erik M., author Hegedus, L. S., advisor 2026-04-22T18:24:21Z 2000 https://hdl.handle.net/10217/244238 https://doi.org/10.25675/3.026862 Alkyl-linked bis-chromium carbene complexes have been prepared via deprotonation and α-alkylation of (methoxy)(methyl) chromium carbene complexes using l,n-bis-triflates as electrophiles. These bis-carbene complexes were then photolyzed with N-protected imidazolines to give protected bis-azapenams. Azapenams are known to undergo a dimerization reaction to form 14-membered bis-imine bis-dioxocyclams. Unfortunately, all attempts to reduce the imine-cyclams to give the stable dioxocyclams were unsuccessful. Both tri- and tetra(ethylene glycol) linked bis-chromium carbene complexes have been synthesized. These carbene complexes were photolyzed with imidazolines to give protected azapenams. The azapenams were transformed into polyether-linked basket dioxocyclams and bis-dioxocyclams. These compounds have cavities for the complexation of both "hard" and "soft" metal ions. The complexes of nickel, barium, and gadolinium were synthesized. doctoral dissertations English eng Colorado State University. Libraries 2000-2019 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Per the terms of a contractual agreement, all use of this item is limited to the non-commercial use of Colorado State University and its authorized users. organic chemistry Synthesis of alkyl- and poly(ethylene)glycol linked bis-dioxocyclams from bis-chromium carbene complexes Text Doctor of Philosophy (Ph.D.) Doctoral Chemistry Colorado State University This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). open.access