Sintesis dan Karakterisasi Senyawa Kompleks [Cu(H2O)2(NH3)4]SO4

Rebecca Febi Permata Br Simorangkir; Amita M. Siregar; Putri Soviana Pakpahan; Yusi Yulfani Siagian; Iis Siti Jahro

doi:10.36312/panthera.v6i2.1192

Authors

Rebecca Febi Permata Br Simorangkir Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Amita M. Siregar Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Putri Soviana Pakpahan Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Yusi Yulfani Siagian Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia
Iis Siti Jahro Program Studi Pendidikan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Medan, Jalan William Iskandar Ps. V, Deli Serdang, Sumatera Utara 20221, Indonesia

DOI:

https://doi.org/10.36312/panthera.v6i2.1192

Keywords:

Classical Characterization, Coordination Chemistry, Complex Synthesis, Ligand Substitution, Copper(II)

Abstract

This study aims to synthesize and characterize the complex compound [Cu(H₂O)₂(NH₃)₄]SO₄ through ligand substitution reaction between CuSO₄·5H₂O and ammonia solution in the context of coordination chemistry learning. The research problem is focused on the mechanism of complex formation, color changes as an indicator of the formation of coordination compounds, synthesis efficiency based on yield values, and confirmation of the presence of complex constituent ions. Laboratory experimental methods were carried out through complex formation, crystallization, separation, and drying of crystals, as well as classical characterization using solubility tests and chemical reactions with HCl, NaOH, and BaCl₂. The results showed a change in the color of the solution from light blue to deep dark blue which indicates the formation of the complex [Cu(H₂O)₂(NH₃)₄]²⁺ due to the substitution of water ligands by ammonia. Dark blue crystals were successfully obtained with a yield of 91.46% which indicates high synthesis efficiency. Characterization tests confirmed the presence of NH₃ ligands, Cu²⁺ ions, and SO₄²⁻ ions as constituents of the complex. These findings are consistent with valence bond theory and crystal field theory in explaining changes in the coordination structure and optical properties of the complex, making this procedure a potential alternative for simple laboratory experiments in coordination chemistry.

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References

Baizura, M., Khairunnisa, N., Putri, S. H., & Putri, W. R. (2025). Sintesis dan Karakterisasi Garam Rangkap Kupri Amonium Sulfat Heksahidrat (Cu(NH₄)₂(SO₄)₂·6H₂O). Jurnal Pendidikan Kimia, Fisika dan Biologi, 1(5), 114-123. https://doi.org/10.61132/jupenkifb.v1i5.679

Garba, H. W., Abubakar, K., Abdullahi, M. S., & Watanpal, R. (2020). Synthesis, Spectroscopy Study of Copper (II) Sulphate Pentahydrate, Tetraamminocopper (II) Sulphate and Bis-Ethylenediamine Copper (II) Sulphate in the Catalytic Reduction of Nitro Phenol Derivatives. International Journal of Scientific Engineering and Science, 4(10), 19-26.

Hermayantiningsih, D., Hakim, M. S., Manurung, T. W., Fiqih, I. M., & Zahra, L. (2025). Preparasi dan Identifikasi Garam Tembaga(II): Sintesis [Cu(NH₃)₄]SO₄·H₂O sebagai Garam Kompleks dan [Cu(NH₄)₂(SO₄)₂·6H₂O sebagai Garam Rangkap. Journal of Chemistry, Education, and Science, 9(12), 59-64. https://doi.org/10.30743/cheds.v9i1.11335

Housecroft, C. E., & Sharpe, A. G. (2018). Inorganic Chemistry (5th Ed.). Harlow: Pearson Education.

Kusumawati, L., Dasna, I. W., & Nazriati, N. (2022). Sintesis dan Karakterisasi Senyawa Kompleks dari Ion Tembaga(II) dengan Ligan Ion Tiosianat dan Isokuinolina. Jurnal MIPA dan Pembelajarannya, 2(6), 1-10. https://doi.org/10.17977/um067v2i6p%p

Lawal, O. S., & Ajani, O. O. (2021). Coordination Chemistry. Abuja: National Open University of Nigeria.

Medved'ko, A. V., Egorova, B. V., Komarova, A. A., Rakhimov, R. D., Krut'ko, D. P., Kalmykov, S. N., & Vatsadze, S. Z. (2016). Copper-Bispidine Complexes: Synthesis and Complex Stability Study. ACS Omega, 1(5), 854-867. https://doi.org/10.1021/acsomega.6b00237

Miessler, G. L., Fischer, P. J., & Tarr, D. A. (2021). Inorganic Chemistry (6th Ed.). London: Pearson Education.

Müller, D., Knoll, C., Gravogl, G., Lager, D., Welch, J. M., Eitenberger, E., Friedbacher, G., Werner, A., Artner, W., Harasek, M., Miletich, R., & Weinberger, P. (2020). CuSO4/[Cu(NH3)4]SO4-Composite Thermochemical Energy Storage Materials. Nanomaterials, 10(12), 2485. https://doi.org/10.3390/nano10122485

Rayner-Canham, G., & Overton, T. (2023). Descriptive Inorganic Chemistry (7th Ed.). New York: W. H. Freeman.

Stec, M., Jagustyn, B., & Słowik, K. (2020). Influence of High Chloride Concentration on pH Control in Hydroxide Precipitation of Heavy Metals. J. Sustain. Metall., 6, 239-249. https://doi.org/10.1007/s40831-020-00270-x

Wang, Y., Yan, X., Zhang, Y., Qin, X., Yu, X., Jiang, L., & Li, B. (2024). Efficient Removal of Nickel from Wastewater Using Copper Sulfate-Ammonia Complex Modified Activated Carbon: Adsorption Performance and Mechanism. Molecules, 29(10), 1-18. https://doi.org/10.3390/molecules29102405