1-(1,3-Benzothiazol-2-ylsulfanyl)propan-2-olate anion as a potential multifunctional ligand in aluminum complexes

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• 作者：Dariusz Basiak^a ; Zbigniew Ochal^a ; Iwona Justyniak^b ; Wanda Ziemkowska^a ; ^{ziemk@ch.pw.edu.pl" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Aluminum ; 1-(1 ; 3-Benzothiazol-2-ylsulfanyl)propan-2-ol ; Multifunctional ligands ; Ring opening polymerization ; Group 13 metals
• 刊名：Polyhedron
• 出版年：2015
• 出版时间：14 December 2015
• 年：2015
• 卷：102
• 期：Complete
• 页码：705-710
• 全文大小：696 K

文摘

1-(1,3-Benzothiazol-2-ylsulfanyl)propan-2-ol (C₁₀H₁₀NS₂OH, LH) was used as a multifunctional ligand in reactions with aluminum trialkyls R₃Al (R = ⁱBu, Et, ^tBu). The reactions at 1:1 M ratio of reagents proceeded with formation of dimeric (R₂AlL)₂ (R = ⁱBu, Et) complexes with a central Al₂O₂ ring, whereas in a presence of an excess of R₃Al the compounds [(R₂Al)(R₃Al)L]₂ (R = ⁱBu, Et) with the central Al₂O₂ ring and R₃Al molecules coordinated to nitrogen atoms were obtained. ⁱBu₃Al reacted with the LH yielding monomeric complex ^tBu₂AlL independently on the molar ratio of reagents. In the compound, Al coordinates to the nitrogen atom to form intramolecular sp²-N donor bonding. The compounds [(ⁱBu₂Al)(ⁱBu₃Al)L]₂ (class="boldFont">1), (Et₂AlL)₂ (class="boldFont">2) and ^tBu₂AlL (class="boldFont">3) were synthesized as pure compounds and characterized. Among four heteroatoms of the ligand, only the oxygen and nitrogen atoms can form bonds with aluminum atoms, whereas two sulfur atoms are non-coordinative. The compounds class="boldFont">1 and class="boldFont">2 are active as an initiator of the ε-caprolactone polymerization.