Piperazin ve 1-(2-Aminoetil)Piperazin İçeren Karışık Ligantlı Cıva(II) Sakkarin Komplekslerinin Sentezi, Spektroskopik ve Yapısal Özellikleri
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https://doi.org/10.5281/zenodo.14569182Anahtar Kelimeler:
Piperazin, 1-(2-aminoetil)piperazin, sakkarin kompleksleriÖzet
Sakkarinat (sac) anyonunun piperazin (ppz) ve N-(2-aminoetil)piperazin (aeppz) ile iki yeni Hg(II) kompleksi olan [Hg(sac)2(ppz)]n (1) ve [Hg(sac)2(aeppz)2] (2) sentezlenmiş ve komplekslerin yapıları element analiz, FT-IR, TGA/DTA, UV-Vis, ve manyetik ölçümler ile belirlenmiştir. Kompleksler [Hg(sac)2] ile ppz ve aeppz ligandlarının tepkimesi sonucu sentezlenmiştir. Kompleks 1’de sac’ın Hg(II) iyonuna N atomu üzerinden olarak koordine olduğu, ppz ligandının ise N atomları üzerinden iki Hg(II) arasında köprü koordinasyonu gerçekleştirdiği önerilmiştir. Kompleks 2’de ise sac ligandının karbonil O atomu üzerinden tek dişili olarak koordine olduğu, aeppz ligandının ise halka ve aminoetil N atomlarını kullanarak çift dişli ligand olarak davrandığı önerilmiştir. Komplekslerin IR spektrumu, ppz, aeppz ve sac ligandlarının tipik absorpsiyon bantlarını göstermektedir. Kompleks 1’in termal bozunmasında, ilk aşamada ppz ligandının ekzotermik olarak uzaklaşması gerçekleşirken, sac ligandı daha yüksek sıcaklıklarda iki ekzotermik basamakta bozunmakta ve geriye kalan elementel cıva ise buharlaşarak ortamdan ayrılmaktadır. Kompleks 2’nin termal bozunmasında ise ilk aşamada aeppz ligandının biri ekzotermik, diğeri endotermik iki basamakta uzaklaşması gerçekleşirken, sac ligandı ise daha yüksek sıcaklıklarda iki ekzotermik basamakta bozunmaktadır.
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