Reaction of the bulky bi-phenols 2,2′-RCH[4,6-(t-Bu)2C6H2OH]2 (R = Me L1MeH2, Ph L1PhH2) with the bis(imido) molybdenum(VI) tert-butoxides [Mo(NR1)(NR2)(Ot-Bu)2] (R1 = R2 = 2,6-C6H3-i-Pr2; R1 = t-Bu, R2 = C6F5) afforded, following the successive removal of tert-butanol, the complexes [Mo(NC6H3i-Pr2-2,6)2L1Me] (1), [Mo(NC6H3i-Pr2-2,6)2L1Ph] (2) and [Mo(Nt-Bu)(μ-NC6F5)(L1Me)]2 (3). Similar use of the tri-phenol 2,6-bis(3,5-di-tert -butyl-2-hydroxybenzyl)-4-methylphenol (L2H3) with [Mo(NC6H3i-Pr2-2,6)2(Ot-Bu)2] afforded the oxo-bridged product [Mo(NC6H3i-Pr2-2,6)(NCMe)(μ-O)L2H]2 (4), whilst use of the tetra-phenols α,α,α′,α′-tetrakis(3,5-di-tert-butyl-2-hydroxyphenyl)-p- or -m-xylene L3pH4/L3mH4 led to {[Mo(NC6H3i-Pr2-2,6)2]2(μ-L3p)} (5) or {[Mo(NC6H3i-Pr2-2,6)2]2(μ-L3m)} (6), respectively. Similar use of [Mo(NC6F5)2(Ot-Bu)2] with L3pH4 afforded, after work-up, the complex {[Mo(NC6F5)(Ot-Bu)2]2(μ-L3p)}·6MeCN (7·6MeCN). Molecular structures of 1, 2·CH2Cl2, 3, 4·6MeCN, 6·2C6H14, and 7·6MeCN are reported and these complexes have been screened for their ability to ring open polymerize (ROP) ε-caprolactone; for comparative studies the precursor complex [Mo(NC6H3i-Pr2-2,6)2Cl2(DME)] (DME = 1,2-dimethoxyethane) has also been screened. Results revealed that good activity is only achievable at temperatures of ≥100 °C over periods of 1 h or more. Polymer polydispersities were narrow, but observed molecular weights (Mn) were much lower than calculated values.
from #Medicine via ola Kala on Inoreader http://ift.tt/1LbRced
via IFTTT
Αρχειοθήκη ιστολογίου
-
►
2023
(138)
- ► Φεβρουαρίου (74)
- ► Ιανουαρίου (64)
-
►
2022
(849)
- ► Δεκεμβρίου (61)
- ► Σεπτεμβρίου (74)
- ► Φεβρουαρίου (65)
-
►
2021
(2936)
- ► Δεκεμβρίου (59)
- ► Σεπτεμβρίου (180)
- ► Φεβρουαρίου (325)
-
►
2020
(1624)
- ► Δεκεμβρίου (293)
- ► Σεπτεμβρίου (234)
- ► Φεβρουαρίου (28)
-
►
2019
(13362)
- ► Δεκεμβρίου (19)
- ► Σεπτεμβρίου (54)
- ► Φεβρουαρίου (5586)
- ► Ιανουαρίου (5696)
-
►
2018
(66471)
- ► Δεκεμβρίου (5242)
- ► Σεπτεμβρίου (5478)
- ► Φεβρουαρίου (4835)
- ► Ιανουαρίου (5592)
-
►
2017
(44259)
- ► Δεκεμβρίου (5110)
- ► Σεπτεμβρίου (5105)
-
►
2016
(7467)
- ► Δεκεμβρίου (514)
- ► Σεπτεμβρίου (1038)
- ► Φεβρουαρίου (793)
-
▼
2015
(2119)
- ► Δεκεμβρίου (940)
-
▼
Νοεμβρίου
(765)
-
▼
Νοε 12
(48)
- OtoRhinoLaryngology & Medicine,New Articles,Novemb...
- Reply to the Letter “Effect of anti-oxidant agents...
- Age-related effects on verbal and visuospatial mem...
- Molecules, Vol. 20, Pages 20341-20354: Direct Amin...
- Molecules, Vol. 20, Pages 20334-20340: Triterpenoi...
- Molecules, Vol. 20, Pages 20320-20333: Enhancement...
- Molecules, Vol. 20, Pages 20312-20319: Cytotoxic A...
- Molecules, Vol. 20, Pages 20355-20380: α-Linolenic...
- IJMS, Vol. 16, Pages 27072-27086: A Comparative St...
- IJMS, Vol. 16, Pages 27058-27071: Benzene-Induced ...
- IJMS, Vol. 16, Pages 27044-27057: Online Measureme...
- A predictive coding account of MMN reduction in sc...
- Successful cutting balloon angioplasty in a child ...
- Development of repeatable arrays of proteins using...
- Materials, Vol. 8, Pages 7650-7662: High Temperatu...
- Microorganisms, Vol. 3, Pages 866-889: Hydrogen Su...
- Microorganisms, Vol. 3, Pages 851-865: Bioactiviti...
- Molecules, Vol. 20, Pages 20297-20311: Derinat Pro...
- Materials, Vol. 8, Pages 7663-7672: Enhanced Erbiu...
- Prenatal diagnosis of single gene disorders using ...
- Identification of biomarkers to measure HIV-specif...
- Dynamics and role of antibodies to Plasmodium falc...
- Metals, Vol. 5, Pages 2119-2127: Liquid Phase Sepa...
- Metals, Vol. 5, Pages 2109-2118: Dynamic Strain Ev...
- Life, Vol. 5, Pages 1610-1628: Non-Standard Geneti...
- Life, Vol. 5, Pages 1587-1609: Starvation-Survival...
- Laws, Vol. 4, Pages 709-728: The Convention for th...
- Molecules, Vol. 20, Pages 20286-20296: β–Cyclodext...
- Effect of anti-oxidant agents in patients with hep...
- Healthcare, Vol. 3, Pages 1158-1173: The Applicati...
- Games, Vol. 6, Pages 604-636: The Role of Implicit...
- Entropy, Vol. 17, Pages 7680-7697: Using Expectati...
- Forests, Vol. 6, Pages 4088-4104: Characterization...
- Coatings, Vol. 5, Pages 830-864: The Search for Du...
- Coatings, Vol. 5, Pages 816-829: Natural Deposit C...
- Catalysts, Vol. 5, Pages 1928-1947: Molybdenum (VI...
- Catalysts, Vol. 5, Pages 1911-1927: Zr-SBA-15 Lewi...
- Catalysts, Vol. 5, Pages 1897-1910: Direct Convers...
- Biomolecules, Vol. 5, Pages 3142-3176: Immune Mech...
- Microarrays, Vol. 4, Pages 551-569: SNPs Array Kar...
- Applied Sciences, Vol. 5, Pages 1134-1163: An Effi...
- JDB, Vol. 3, Pages 93-111: Pbx4 is Required for th...
- Reproductive history and risk of cognitive impairm...
- Toxins, Vol. 7, Pages 4706-4729: Metabolism of Deo...
- Reasons & Symptoms of Dengue Fever
- Intra-individual lap time variation of the 400-m w...
- IJMS, Vol. 16, Pages 27032-27043: A PPO Promoter f...
- IJMS, Vol. 16, Pages 27015-27031: Sildenafil Prote...
-
▼
Νοε 12
(48)
Αναζήτηση αυτού του ιστολογίου
Πέμπτη 12 Νοεμβρίου 2015
Catalysts, Vol. 5, Pages 1928-1947: Molybdenum (VI) Imido Complexes Derived from Chelating Phenols: Synthesis, Characterization and ɛ-Caprolactone ROP Capability
Εγγραφή σε:
Σχόλια ανάρτησης (Atom)
-
Αλέξανδρος Γ. Σφακιανάκης Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,0030693260717...
-
heory of COVID-19 pathogenesis Publication date: November 2020Source: Medical Hypotheses, Volume 144Author(s): Yuichiro J. Suzuki ScienceD...
-
Alimentary Pharmacology &Therapeutics, EarlyView. https://ift.tt/2qECBIJ
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου
Σημείωση: Μόνο ένα μέλος αυτού του ιστολογίου μπορεί να αναρτήσει σχόλιο.