55 research outputs found

    Carbon Origami via an Alumina-Assisted Cyclodehydrofluorination Strategy

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    The synthesis of pristine non‐planar nanographenes (NGs) via a cyclodehydrofluorination strategy is reported and the creation of highly strained systems via alumina‐assisted C−F bond activation is shown. Steric hindrance could execute an alternative coupling program leading to rare octagon formation offering access to elusive non‐classical NGs. The combination of two alternative ways of folding could lead to the formation of various 3D NG objects, resembling the Japanese art of origami. The power of the presented “origami” approach is proved by the assembly of 12 challenging nanographenes that are π‐isoelectronic to planar hexabenzocoronene but forced out of planarity

    Peraturan Bersama Menteri Agama dan Menteri dalam Negeri Nomor 08 dan 09 Tahun 2006 Tentang Pendirian Rumah Ibadat (Kajian dalam Perspektif Hak Asasi Manusia )

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    Pundamental 1945 Constitution as the rule has been set explicitly for religious freedom in the run by followers, who belong to one human rights has, but in reality the persecution of religious life and often inevitable. Between religious persecution can come from various directions such as harassing each other, mutual intimidate(violence) and that most often occurs between religious persecution that is prihal establishment synagogue. Therefore, in terms of the establishment of the synagogue there must be government intervention to regulate it, if in this case given the freedom and without any clear rules, the sectarian conflict will not be able to avoid. One step from the government to avoid conflict in the establishment of the synagogue is to be issued the Joint Decree of the Minister of Religious Affairs and the Minister of Home Affairs Number 08 and Number 09 Year 2006 About the Construction of Houses of Worship that aims to create harmony and peace between religious and have certainty Strong law

    New Isolated-Pentagon-Rule Isomer of C<sub>92</sub> Isolated as Trifluoromethyl and Chlorido Derivatives: C<sub>92</sub>(38)(CF<sub>3</sub>)<sub>14/16</sub> and C<sub>92</sub>(38)Cl<sub>20/22</sub>

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    High-temperature trifluoromethylation and chlorination of the C<sub>92</sub> fraction followed by single-crystal X-ray diffraction with the use of synchrotron radiation resulted in the structure determination of C<sub>92</sub>(38)­(CF<sub>3</sub>)<sub>14</sub>, five isomers of C<sub>92</sub>(38)­(CF<sub>3</sub>)<sub>16</sub>, and C<sub>92</sub>(38)­Cl<sub>20/22</sub>. Their addition patterns are stabilized by the formation of isolated CC bonds and aromatic substructures. According to quantum-chemical calculations, the newly detected <i>C</i><sub>1</sub>–C<sub>92</sub>(38) belongs to the most stable isomers of C<sub>92</sub>

    Carbon Origami via an Alumina‐Assisted Cyclodehydrofluorination Strategy

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    The synthesis of pristine non‐planar nanographenes (NGs) via a cyclodehydrofluorination strategy is reported and the creation of highly strained systems via alumina‐assisted C−F bond activation is shown. Steric hindrance could execute an alternative coupling program leading to rare octagon formation offering access to elusive non‐classical NGs. The combination of two alternative ways of folding could lead to the formation of various 3D NG objects, resembling the Japanese art of origami. The power of the presented “origami” approach is proved by the assembly of 12 challenging nanographenes that are π‐isoelectronic to planar hexabenzocoronene but forced out of planarity

    New Isolated-Pentagon-Rule Isomers of Fullerene C<sub>98</sub> Captured as Chloro Derivatives

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    Fullerene C<sub>98</sub> possesses 259 isomers obeying the isolated pentagon rule (IPR), from which two, nos. 116 and 248, have been confirmed earlier as chloro derivatives. High-temperature chlorination of C<sub>98</sub>-containing mixtures afforded crystals of several chloro derivatives, and their structure elucidation by X-ray crystallography revealed the presence of new isomers, nos. 107, 109, and 120, in the fullerene soot. Evidence for an isomer of no. 111 is also presented. In addition, a new chloride of the known isomer 248 has been isolated and structurally studied. The chlorination patterns of the chlorides are discussed in terms of the formation of isolated CC bonds and aromatic substructures on the fullerene cages

    New Giant Fullerenes Identified as Chloro Derivatives: Isolated-Pentagon-Rule C<sub>108</sub>(1771)Cl<sub>12</sub> and C<sub>106</sub>(1155)Cl<sub>24</sub> as well as Nonclassical C<sub>104</sub>Cl<sub>24</sub>

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    High temperature chlorination of HPLC fractions of higher fullerenes followed by single crystal X-ray diffraction with the use of synchrotron radiation resulted in the structure determination of IPR C<sub>106</sub>(1155)­Cl<sub>24</sub> and IPR C<sub>108</sub>(1771)­Cl<sub>12</sub>. C<sub>106</sub>(1155)­Cl<sub>24</sub> is cocrystallized with C<sub>104</sub>Cl<sub>24</sub>, a chloride of the nonclassical isomer of C<sub>104</sub>. The moderately stable isomer C<sub>106</sub>(1155) and the most stable C<sub>108</sub>(1771) represent so far the largest pristine fullerenes with known cages

    Skeletal Transformation of a Classical Fullerene C<sub>88</sub> into a Nonclassical Fullerene Chloride C<sub>84</sub>Cl<sub>30</sub> Bearing Quaternary Sequentially Fused Pentagons

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    A classical fullerene is composed of hexagons and pentagons only, and its stability is generally determined by the Isolated-Pentagon-Rule (IPR). Herein, high-temperature chlorination of a mixture containing a classical IPR-obeying fullerene C<sub>88</sub> resulted in isolation and X-ray crystallographic characterization of non-IPR, nonclassical (<i>NC</i>) fullerene chloride C<sub>84</sub>(<i>NC</i>2)­Cl<sub>30</sub> (<b>1</b>) containing two heptagons. The carbon cage in C<sub>84</sub>(<i>NC</i>2)­Cl<sub>30</sub> contains 14 pentagons, 12 of which form two pairs of fused pentagons and two groups of quaternary sequentially fused pentagons, which have never been observed in reported carbon cages. All 30 Cl atoms form an unprecedented single chain of ortho attachments on the C<sub>84</sub> cage. A reconstruction of the pathway of the chlorination-promoted skeletal transformation revealed that the previously unknown IPR isomer C<sub>88</sub>(3) is converted into <b>1</b> by two losses of C<sub>2</sub> fragments followed by two Stone–Wales rearrangements, resulting in the formation of very stable chloride with rather short C–Cl bonds
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