File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Synthesis and crystal structure of nickel(II) and zinc(II) complexes with 2,4-bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazine

TitleSynthesis and crystal structure of nickel(II) and zinc(II) complexes with 2,4-bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazine
Authors
KeywordsCatalytic methanolysis
Crystal structure
Dipyrazoltriazine
Nickel(II)
Zinc(II)
Issue Date2001
Publisher中國科學院. The Journal's web site is located at http://jcxg.chinajournal.net.cn/
Citation
Science In China, Series C: Life Sciences, 2001, v. 44 n. 1, p. 80-92 How to Cite?
Abstract2,4-Bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazine(bpt) has been synthesized by using a new, simple and general method with high yields. Reactions of bpt with Ni(ClO 4) 2 · 6H 20 and Zn(ClO 4) 2 · 6H 2O in methanol gave mononuclear complex [Ni(bpt) 2] · (ClO 4) 2 · H 2O and ternary complex [Zn(mpt) 2(dmp)](ClO 4) 2 respectively, where mpt (2,4-dimethoxy-6-(3,5-dimethyl-pyrazol-1-yl)-1,3,5-triazine) and dmp(3,5-dimethylpyrazole) are the alcoholysis products of bpt in the presence of Zn 2+ ion. A possible mechanism for this catalytic reaction was proposed. X-ray crystal structure for ligand bpt, Ni and Zn complexes are reported. The protonated form of the ligand bpt crystallizes as its perchlorate salt including one molecule of water, [Hbpt · H 2O · ClO 4]. The proton is located on one pyrazole N-atom. [Hbpt · H 2O · ClO 4], in which [Hbpt] + is in cis-cis conformation, are packed in slipped stacks of approximately parallel layers. The π-π overlap interactions between the non-protonized pyrazoles of the adjacent layers give a zigzag arrangement of the planar aromatic [Hbpt] + molecules. In [Ni(bpt) 2](ClO 4) 2 · H 2O, bpt are meridionally three-coordinated with Ni 2+. The coordination sphere around Ni 2+ is a slightly distorted square bipyramid, where four pyrazole nitrogen atoms occupy the basal positions and two triazine nitrogen atoms the apical one. In [Zn(mpt) 2(dmp)](ClO 4) 2, the Zn atom is coordinated with a pair of bidentate mpt ligands and one monodentate dmp ligand, forming a distorted trigonal bipyramid, where the two triazine nitrogen atoms of mpt and one nitrogen atom of dmp occupy the basal positions, and the two pyrazole nitrogen atoms of mpt the apical one.
Persistent Identifierhttp://hdl.handle.net/10722/69514
ISSN
2011 Impact Factor: 1.61

 

DC FieldValueLanguage
dc.contributor.authorYang, Cen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorCui, Yen_HK
dc.contributor.authorYang, Yen_HK
dc.date.accessioned2010-09-06T06:14:22Z-
dc.date.available2010-09-06T06:14:22Z-
dc.date.issued2001en_HK
dc.identifier.citationScience In China, Series C: Life Sciences, 2001, v. 44 n. 1, p. 80-92en_HK
dc.identifier.issn1006-9305en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69514-
dc.description.abstract2,4-Bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazine(bpt) has been synthesized by using a new, simple and general method with high yields. Reactions of bpt with Ni(ClO 4) 2 · 6H 20 and Zn(ClO 4) 2 · 6H 2O in methanol gave mononuclear complex [Ni(bpt) 2] · (ClO 4) 2 · H 2O and ternary complex [Zn(mpt) 2(dmp)](ClO 4) 2 respectively, where mpt (2,4-dimethoxy-6-(3,5-dimethyl-pyrazol-1-yl)-1,3,5-triazine) and dmp(3,5-dimethylpyrazole) are the alcoholysis products of bpt in the presence of Zn 2+ ion. A possible mechanism for this catalytic reaction was proposed. X-ray crystal structure for ligand bpt, Ni and Zn complexes are reported. The protonated form of the ligand bpt crystallizes as its perchlorate salt including one molecule of water, [Hbpt · H 2O · ClO 4]. The proton is located on one pyrazole N-atom. [Hbpt · H 2O · ClO 4], in which [Hbpt] + is in cis-cis conformation, are packed in slipped stacks of approximately parallel layers. The π-π overlap interactions between the non-protonized pyrazoles of the adjacent layers give a zigzag arrangement of the planar aromatic [Hbpt] + molecules. In [Ni(bpt) 2](ClO 4) 2 · H 2O, bpt are meridionally three-coordinated with Ni 2+. The coordination sphere around Ni 2+ is a slightly distorted square bipyramid, where four pyrazole nitrogen atoms occupy the basal positions and two triazine nitrogen atoms the apical one. In [Zn(mpt) 2(dmp)](ClO 4) 2, the Zn atom is coordinated with a pair of bidentate mpt ligands and one monodentate dmp ligand, forming a distorted trigonal bipyramid, where the two triazine nitrogen atoms of mpt and one nitrogen atom of dmp occupy the basal positions, and the two pyrazole nitrogen atoms of mpt the apical one.en_HK
dc.languageengen_HK
dc.publisher中國科學院. The Journal's web site is located at http://jcxg.chinajournal.net.cn/en_HK
dc.relation.ispartofScience in China, Series C: Life Sciencesen_HK
dc.subjectCatalytic methanolysisen_HK
dc.subjectCrystal structureen_HK
dc.subjectDipyrazoltriazineen_HK
dc.subjectNickel(II)en_HK
dc.subjectZinc(II)en_HK
dc.titleSynthesis and crystal structure of nickel(II) and zinc(II) complexes with 2,4-bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazineen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0036-8237&volume=44&issue=1&spage=80&epage=92&date=2001&atitle=Synthesis+and+crystal+structure+of+nickel(II)+and+zinc(II)+complexes+with+2,4-bis(3,5-dimethylpyrazol-1-yl)-6-methoxyl-1,3,5-triazineen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0035244769en_HK
dc.identifier.hkuros62645en_HK
dc.identifier.volume44en_HK
dc.identifier.issue1en_HK
dc.identifier.spage80en_HK
dc.identifier.epage92en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridYang, C=8433153800en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridCui, Y=35791638600en_HK
dc.identifier.scopusauthoridYang, Y=7409385281en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats