SCHEDULED MAINTENANCE
A salicylaldiminate/Pd(trifluoroacetate)2 [SalAld/Pd(tfa)2] initiating system for C1 polymerization of diazoacetate: generation of an active initiator from ordinary reagents with facile procedures†
Abstract
Salicylaldiminate (SalAld)-ligated Pd complexes were generated by the reaction of SalAld with Pd(tfa)2 in THF, and their initiating ability for C1 polymerization of diazoacetate was investigated. When a mixture of a series of SalAlds and Pd(tfa)2 ([SalAld]/[Pd(tfa)2] = 2 : 1–4 : 1) was employed for the polymerization of ethyl diazoacetate (EDA), polyEDA’ with a high number-average molar mass (Mn,SEC = 20000–35 000) was obtained in moderate yield; the polymer yield became highest (50%) when the polymerization was conducted with a [SalAld]/[Pd(tfa)2] ratio of 4 : 1 at 50 °C for 13 h. NMR analyses indicated that polyEDA’ had a syndiotactic-rich main chain stereo-structure. These results demonstrate that the SalAld/Pd(tfa)2 system is a new effective initiating system for the C1 polymerization of diazoacetate, which can be generated from a combination of ordinary reagents with facile procedures.
![Graphical abstract: A salicylaldiminate/Pd(trifluoroacetate)2 [SalAld/Pd(tfa)2] initiating system for C1 polymerization of diazoacetate: generation of an active initiator from ordinary reagents with facile procedures](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D3PY01426F&imageInfo.ImageIdentifier.Year=2024)
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