TY - JOUR
T1 - Zinc complexes incorporating with symmetrical and asymmetrical polydentate nitrogen-donor pyrrolyl ligands
T2 - Synthesis, characterization, and ring-opening polymerization
AU - Hsiao, Ching Sheng
AU - Wang, Ting Yin
AU - Datta, Amitabha
AU - Liao, Fu Xing
AU - Hu, Chin Han
AU - Lin, Chia Her
AU - Huang, Jui Hsien
AU - Lee, Ting Yu
N1 - Funding Information:
The authors gratefully acknowledge the National Science Council of Taiwan for financial assistance. JHH would also like to thank the National Changhua University of Education for providing the X-ray facility.
PY - 2012/11/1
Y1 - 2012/11/1
N2 - The reactions of Zn-alkyls with bidentate as well as symmetrical and asymmetrical tridentate pyrrolyl ligands, have been carried out and characterized. Reacting ZnR 2 with 1 equiv of C 4H 3NH(2-CH 2NH tBu) in diethyl ether yields [Zn{C 4H 3N(2-CH 2NH tBu)}R] (1, R = Me; 2, R = Et) in high yield. Similarly, the reactions of 2 equiv of C 4H 3NH(2-CH 2NH tBu) and ZnR 2 (R = Me, Et) in toluene both produce [Zn{C 4H 3N(2-CH 2NH tBu)} 2] (3). Furthermore, while subjecting 2 equiv of C 4H 2NH(2-CH 2NH tBu)(5-CH 2NMe 2) with ZnMe 2 in diethyl ether, affords [Zn{C 4H 2N(2-CH 2NH tBu)(5-CH 2NMe 2)} 2] (4) and additionally, reacting C 4H 2NH(2,5-CH 2NH tBu) 2 with ZnMe 2 generates [Zn{C 4H 2N(2,5-CH 2NH tBu) 2} 2] (5) in satisfactory yield. All the aforementioned compounds were characterized by 1H and 13C NMR spectrometry and the molecular structures were determined by single crystal X-ray diffractometry. Compounds 1, 3, 4 and 5 are moderate catalysts for the ring-opening polymerization of ε-caprolactone in toluene.
AB - The reactions of Zn-alkyls with bidentate as well as symmetrical and asymmetrical tridentate pyrrolyl ligands, have been carried out and characterized. Reacting ZnR 2 with 1 equiv of C 4H 3NH(2-CH 2NH tBu) in diethyl ether yields [Zn{C 4H 3N(2-CH 2NH tBu)}R] (1, R = Me; 2, R = Et) in high yield. Similarly, the reactions of 2 equiv of C 4H 3NH(2-CH 2NH tBu) and ZnR 2 (R = Me, Et) in toluene both produce [Zn{C 4H 3N(2-CH 2NH tBu)} 2] (3). Furthermore, while subjecting 2 equiv of C 4H 2NH(2-CH 2NH tBu)(5-CH 2NMe 2) with ZnMe 2 in diethyl ether, affords [Zn{C 4H 2N(2-CH 2NH tBu)(5-CH 2NMe 2)} 2] (4) and additionally, reacting C 4H 2NH(2,5-CH 2NH tBu) 2 with ZnMe 2 generates [Zn{C 4H 2N(2,5-CH 2NH tBu) 2} 2] (5) in satisfactory yield. All the aforementioned compounds were characterized by 1H and 13C NMR spectrometry and the molecular structures were determined by single crystal X-ray diffractometry. Compounds 1, 3, 4 and 5 are moderate catalysts for the ring-opening polymerization of ε-caprolactone in toluene.
KW - Pyrrolyl
KW - Ring-opening polymerization
KW - Zinc
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U2 - 10.1016/j.jorganchem.2012.08.016
DO - 10.1016/j.jorganchem.2012.08.016
M3 - Article
AN - SCOPUS:84865743275
SN - 0022-328X
VL - 718
SP - 82
EP - 88
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
ER -