Cited by 178biodegradable polymer synthesis and propertiesOrganometallic Complex Synthesis and CatalysisAdvanced Polymer Synthesis and Characterization

Metal‐Size Influence in Iso‐Selective Lactide Polymerization

Open access
Bakewell, Clare, White, Andrew J. P., Long, Nicholas J., Williams, Charlotte K.·2014·Angewandte Chemie International Edition

Abstract

Iso‐selective initiators for the ring‐opening polymerization (ROP) of rac‐lactide are rare outside of Group 13. We describe the first examples of highly iso‐selective lutetium initiators. The phosphasalen lutetium ethoxide complex shows excellent iso‐selectivity, with a Pi value of 0.81–0.84 at 298 K, excellent rates, and high degrees of polymerization control. Conversely, the corresponding La derivative exhibits moderate heteroselectivity (Ps=0.74, 298 K). Thus, the choice of metal center is shown to be crucial in determining the level and mode of stereocontrol. The relative order of rates for the series of complexes is inversely related to metallic covalent radius: that is, La>Y>Lu.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/anie.201403643

Cites

71 of 71 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Rare-earth metal catalysts supported by phosphasalen ligands displayed both high reactivity and stereoselectivity (Pi up to 0.84 at 25 °C) with the ability to produce high molecular weight isotactic PLAs (Mn > 100 kDa) with extremely narrow polydispersities (Ð < 1.1).

    “Rare-earth metal catalysts supported by phosphasalen ligands (such as Ln-phosSALEN in Figure 8) displayed both high reactivity and stereoselectivity (Pi up to 0.84 at 25°C) with the ability to produce high molecular weight isotactic PLAs (Mn > 100 kDa) with extremely narrow polydispersities (Ð <1.1).310,311”

    From Catalysis as an Enabling Science for Sustainable Polymers (2018) · cites this paper as [311]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 72 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Bakewell, C., White, A. J. P., Long, N. J., & Williams, C. K.
Affiliations
Imperial College London (GB)
Corresponding author
  • Long, Nicholas J.
  • Williams, Charlotte K.
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2014-07-07
Volume
53
Issue
35
Pages
9226-9230
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2161922448
Cited by
178
References
72
Citations by year
2026: 3 · 2025: 2 · 2024: 4 · 2023: 4 · 2022: 10 · 2021: 9 · 2020: 16 · 2019: 21 · 2018: 23 · 2017: 31 · 2016: 27 · 2015: 23 · 2014: 4
FWCI
10.74
Type
journal article
Language
en
Open access
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Spiral (Imperial College London) (submittedVersion, other-oa)
Funders
Engineering and Physical Sciences Research Council (EP/C544838/1, EP/K035274/1, EP/C544846/1)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Chemistry › Organic Chemistry › Organometallic Complex Synthesis and Catalysis
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
Keywords
rac-lactide, stereocontrol, polymerization rate, degree of polymerization control

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review