Rossmeier, Thomas and Reil, Markus and Korber, Nikolaus (2004) First characterization of the ammine-ammonium complex [{NH4(NH3)(4)}(2)(mu-NH3)(2)](2+) in the crystal structure of [NH4(NH3)(4)][B(C6H5)(4)]center dot NH3 and the [NH4(NH3)(4)](+) complex in [NH4(NH3)(4)][Ca(NH3)(7)]As3S6 center dot 2NH(3) and [NH4(NH3)(4)[Ba(NH3)(8)]As3S6 center dot NH3. INORGANIC CHEMISTRY, 43 (6). pp. 2206-2212. ISSN 0020-1669, 1520-510X
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The compound [NH4(NH3)(4)][B(C6H5)(4)].NH3 (1) was prepared by the reaction of NaB(C6H5)(4) with a proton-charged ion-exchange resin in liquid ammonia. [NH4(NH3)(4)][Ca(NH3)(7)]As3S6.2NH(3) (2) and [NH4(NH3)(4)][Ba(NH3)(8)]As3S6.NH3 (3) were synthesized by reduction of As4S4 with Ca and Ba in liquid ammonia. All ammoniates were characterized by low-temperature single-crystal X-ray structure analysis. They were found to contain the ammine-ammonium complex with the maximal possible number of coordinating ammonia molecules, the [NH4(NH3)(4)](+) ion. 1 contains a special dimer, the [{NH4(NH3)(4)}(2)(mu-NH3)(2)](2+) ion, which is formed by two [NH4(NH3)(4)](+) ions linked by two ammonia molecules. The H3N-(HN)-N-... hydrogen bonds in all three compounds range from 1.82 to 2.20 Angstrom (DHA = Donor-H(...)Acceptor angles: 156-178degrees). In 2 and 3, additional H2N-(HS)-S-... bonds to the thioanions are observed, ranging between 2.49 and 3.00 Angstrom (DHA angles: 120-175degrees). Two parallel phenyl rings of the [B(C6H5)(4)](-) anion in 1 form a pi(...)pi hydrogen bond ((CC)-C-... distance, 3.38 Angstrom; DHA angles, 82degrees), leading to a dimeric [B(C6H5)(4)](2)(2-) ion.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | AB-INITIO; NH3; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Nikolaus Korber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Jul 2021 10:01 |
| Last Modified: | 21 Jul 2021 10:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37864 |
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