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Part 1: Document Description
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Citation |
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Title: |
Publication Data for: Regio‐ and Stereospecific Cyclopolymerization of α,ω‐Diynes by Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Complexes |
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Identification Number: |
doi:10.18419/darus-1691 |
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Distributor: |
DaRUS |
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Date of Distribution: |
2021-04-30 |
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Version: |
1 |
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Bibliographic Citation: |
Probst, Patrick; Elser, Iris; Schowner, Roman; Benedikter, Mathis; Buchmeiser, Michael, 2021, "Publication Data for: Regio‐ and Stereospecific Cyclopolymerization of α,ω‐Diynes by Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Complexes", https://doi.org/10.18419/darus-1691, DaRUS, V1, UNF:6:BwlHr5q1geHqOx5CFuqWLA== [fileUNF] |
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Citation |
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Title: |
Publication Data for: Regio‐ and Stereospecific Cyclopolymerization of α,ω‐Diynes by Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Complexes |
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Identification Number: |
doi:10.18419/darus-1691 |
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Authoring Entity: |
Probst, Patrick (Universität Stuttgart) |
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Elser, Iris (Universität Stuttgart) |
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Schowner, Roman (Universität Stuttgart) |
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Benedikter, Mathis (Universität Stuttgart) |
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Buchmeiser, Michael (Universität Stuttgart) |
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Grant Number: |
358283783 - SFB 1333 |
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Grant Number: |
BU 2174/19-1 |
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Distributor: |
DaRUS |
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Access Authority: |
Buchmeiser, Michael |
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Depositor: |
Probst, Patrick |
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Date of Deposit: |
2021-03-11 |
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Holdings Information: |
https://doi.org/10.18419/darus-1691 |
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Study Scope |
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Keywords: |
Chemistry, catalysts, cyclopolymerization, metathesis, molybdenum, regioselectivity |
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Topic Classification: |
inorganic chemistry |
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Abstract: |
All primary data files and processed data of the journal article from Buchmeiser group. Spectroscopic data of the different polymers is put into folders for each polymer, data of table 1 is given as excel sheet, and an overview of the different catalysts as .tif image is attatched. |
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Notes: |
Abstract: Both solvent‐free and acetonitrile‐containing cationic molybdenum imido alkylidene N‐heterocyclic carbene (NHC) complexes of the general formula [Mo(NR′)(CHCMe2R)(NHC)(X)+ A−] (R′ = 2,6‐Cl2‐C6H3, tBu, 2‐CF3‐C6H4, 2‐tBu‐C6H4, 2,6‐iPr2‐C6H3, 2,6‐Me2‐C6H3; R = Me, Ph; NHC = 1,3‐dimesitylimidazol‐2‐ylidene (IMes), 1,3‐di‐iPr‐imidazol‐2‐ylidene (IPr), 1,3,5‐triphenyl‐1,3,4‐triazol‐2‐ylidene); X = CF3SO3, C6F5O, OCH(CF3)2, OC(CF3)3, pyrrolide, C6F5COO, 2,6‐(CF3)2‐C6H3COO; A− = B(ArF)4−, Al(OC(CF3)3)4−), have been investigated for their propensity to cyclopolymerize 4,4‐disubstituted 1,6‐heptadiynes. All metal complexes contain a stereogenic (chiral) metal center, which accounts for the high reactivity and high regioselectivity of insertion (>99%) that are observed for all metal complexes, leading to highly conjugated, α‐insertion‐derived polyenes that are based on a highly regular polymer backbone and that show absorption maxima close to 600 nm. With the chiral monomer 4‐(ethoxycarbonyl)‐4‐(1S,2R,5S)‐(‐)‐menthoxycarbonyl‐1,6‐heptadiyne, high syndiospecifity (>99% syndiotactic) is observed. A mechanism explaining the high regio‐ and stereoselectivity is presented. Thus, α‐addition of the monomers proceeds chain‐end‐controlled trans to the NHC and is preferred over β‐addition through intramolecular Mo‐O chelation. Insertion of the monomers entails double inversion at the stereogenic metal center in the course of one complete monomer insertion. |
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Methodology and Processing |
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Sources Statement |
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Data Access |
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Other Study Description Materials |
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Related Publications |
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Citation |
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Title: |
Probst, P., Elser, I., Schowner, R., Benedikter, M. J., Buchmeiser, M. R., Regio‐ and Stereospecific Cyclopolymerization of α,ω‐Diynes by Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Complexes. Macromol. Rapid Commun. 2020, 41, 1900398 |
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Identification Number: |
10.1002/marc.201900398 |
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Bibliographic Citation: |
Probst, P., Elser, I., Schowner, R., Benedikter, M. J., Buchmeiser, M. R., Regio‐ and Stereospecific Cyclopolymerization of α,ω‐Diynes by Cationic Molybdenum Imido Alkylidene N‐Heterocyclic Carbene Complexes. Macromol. Rapid Commun. 2020, 41, 1900398 |
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File Description--f58787 |
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File: Table1.tab |
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Notes: |
UNF:6:BwlHr5q1geHqOx5CFuqWLA== |
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List of Variables: |
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Variables |
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f58787 Location: |
Variable Format: character Notes: UNF:6:rqThUtnSy6Z/20vrs0vSxw== |
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f58787 Location: |
Variable Format: character Notes: UNF:6:OeTQS2XEq5+HARLL98jSVw== |
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f58787 Location: |
Summary Statistics: StDev 0.5530799543442485; Max. 3.1; Valid 13.0; Min. 1.4; Mean 1.8615384615384616 Variable Format: numeric Notes: UNF:6:QhH5tZcSokG3iD/T553fyA== |
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f58787 Location: |
Summary Statistics: Valid 13.0; Max. 116000.0; StDev 30218.119458195004; Min. 7200.0; Mean 23784.615384615387; Variable Format: numeric Notes: UNF:6:DIN6gOrL/hANd5/Y3B895Q== |
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Catalysts Mo1 to Mo11.tif |
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Notes: |
image/tiff |
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Label: |
Poly(4,4-Bis(3,5-diethoxyphenylcarbonyloxymethyl)-1,6-heptadiyne) by Mo 1.zip |
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Notes: |
application/zip |
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Poly(4-Ethoxycarbonyl-4-(1S,2R,5S)-(-)-mehtoxycarbonyl-1,6-heptadiyne) by Mo 1.zip |
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application/zip |
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Poly(DEDPM) by Mo1.zip |
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application/zip |
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Poly(DEDPM) by Mo10.zip |
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application/zip |
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Poly(DEDPM) by Mo11.zip |
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application/zip |
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Poly(DEDPM) by Mo2.zip |
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application/zip |
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Poly(DEDPM) by Mo3.zip |
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application/zip |
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Poly(DEDPM) by Mo4.zip |
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application/zip |
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Poly(DEDPM) by Mo5.zip |
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application/zip |
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Poly(DEDPM) by Mo6.zip |
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application/zip |
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Poly(DEDPM) by Mo7.zip |
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application/zip |
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Poly(DEDPM) by Mo8.zip |
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application/zip |
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Poly(DEDPM) by Mo9.zip |
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application/zip |
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Table 1.xlsx |
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Notes: |
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |