A New Alchemical Poem Attributed to Khālid b. Yazīd (d. ca. 705)

This paper deals primarily with the identification of an inaccurately catalogued alchemical poem attributed to the famous Umayyad prince Khālid b. Yazīd (d. 705), edited, translated, and commented upon here for the first time. The paper also addresses the authenticity of Khālid’s interest in alchemy and connects that interest to the need of the early Islamic empire to develop its own gold coinage as a sign of political independence from Byzantine coinage that was up till then the currency of the lands occupied by early Muslims in the regions of modern-day Egypt and Syria. On the matter of the legendry character of Khālid which was apparently started by Ibn Khaldun and passed on after him to most nineteenth-century and early twentieth-century orientalists, the paper exposes here the inner contradictions in Ibn Khaldun’s theorising on the matter, and his failure to understand why someone like the historical Prince Khālid would be interested in alchemy.     

A sensitive reagentless pH probe with a ca. 120 mV/pH unit response

The use of a basal plane pyrolitic graphite electrode immobilised with two redox active species each capable of undergoing a two-electron, two-proton redox process has allowed the development of a sensitive pH probe over a wide pH and temperature range. When the values of the peak potentials of the two processes are combined they shift by ca. 120 mV/pH unit at 25 °C, as measured against two independent, defined reference electrodes.Dedicated to Zbigniew Galus on the occasion of his 70th birthday     

Condensed aromatics—XXIV. Cyclo[d.e.d.e.e.d.e.d.e.e]decakisbenzene

The macrocyclic condensed aromatic hydrocarbon C₄₀H₂₀ cyclo[d.e.d.e.e.d.e.d.e.e] decakisbenzene is treated. It belongs to the class of cycloarenes. The simple Hückel molecular orbital analysis has been performed and employed in the construction of a harmonic force field. The set of calculated vibrational frequencies is reported.     

Condensed aromatics—XXIII. Cyclo[d.e.d.e.d.e.d.e.d.e.d.e]dodecakisbenzene (kekulene)

Some topological properties of coronoids are given. These systems have chemical counterparts in cycloarenes. For one of these molecules, viz. C₄₈H₂₄ kekulene, the simple Hückel molecular orbital analysis has been performed and employed in the construction of a harmonic force field. Finally the set of calculated vibrational frequencies is reported.     

Synthesis and Characterization of Cobalt(II), Nickel(II), and Zinc(II) Complexes with N,N ′-bis( Trans- Cinnamaldehyde)-1,2-Diiminoethane Ligand, (ca 2 en): Crystal and Molecular Structures of Co(ca 2 en)Cl 2 , Co(ca 2 en)Br 2 and Ni(ca 2 en)Br 2

A series of new complexes of the Schiff base obtained from trans- cinnamaldehyde and 1,2-diaminoethane (en) with the general formula of M(ca 2 en)X 2 (M = Co(II), Ni(II), Zn(II); X = Cl, Br, I, NCS, N 3 ; (ca 2 en) = N,N '-bis( trans- cinnamaldehyde)-1,2-diiminoethane) have been synthesized and characterized. The crystal structures of three pseudo -tetrahedral complexes, Co(ca 2 en)Cl 2 ( 1 ), Co(ca 2 en)Br 2 ( 2 ), and Ni(ca 2 en)Br 2 ( 5 ), were determined by X-ray diffraction. Crystal data for 1 , Co(ca 2 en)Cl 2 : monoclinic; space group P 2 1 / c ; a = 7.1925(14) Å, b = 20.327(4) Å, c = 14.029(3) Å; g =95.06(3)°; V = 2043.1(7) Å 3 ; Z = 4; and final R 1 = 0.0381 ( wR 2 = 0.0718) for 4653 independent reflections with I > 2 σ ( I ) and 226 parameters; 2 , Co(ca 2 en)Br 2 ; monoclinic, space group P 2 1 / c ; a = 7.3780(6) Å, b = 20.4372(17) Å, c = 14.1649(12) Å; g = 94.902(2)°; V = 2128.1(3) Å 3 ; Z = 4; and final R 1 = 0.0491 ( wR 2 = 0.1052) for 5858 independent reflections with I > 2 σ ( I ) and 227 parameters; 5 , Ni(ca 2 en)Br 2 : monoclinic, space group P 2 1 / c ; a = 7.2388(6) Å, b = 20.4651(16) Å, c = 14.2782(12) Å; g = 94.160(2)°; V = 2109.6(3) Å 3 ; Z = 4; R 1 = 0.0481 ( wR 2 = 0.0907) for 5914 independent reflections with I > 2 σ ( I ) and 227 parameters. The structures consist of discrete molecules in which the coordination polyhedra about the central metal ion are highly distorted tetrahedra with Cl(1)-Co-Cl(2), 115.51(3)°; N(1)-Co-N(2), 83.71(7)°; Br(1)-Co-Br(2), 114.58(4)°; N(1)-Co-N(2), 84.92(19)°; and Br(1)-Ni-Br(2), 125.23(3)°; N(1)-Ni-N(2), 85.11(15)° in 1 , 2 , and 5 , respectively. The stiryl groups are cis -endo with respect to the metal atom and the chelate ring is puckered. Utilization is made of electronic and vibrational spectra in structural diagnosis of other complexes.     

Prof. Dr. E. Gorter, 19. Februar 1881 –17. Februar 1954

Ohne Zusammenfassung     

Über die roten Anile. 1. Mitt.

Zusammenfassung Durch Anwendung der vonF. Kröhnke ¹ ausgearbeiteten Methode zur Darstellung von -Keto-carbonsäuren konnte man über die roten Anile VIII die entsprechenden -Keto-(3,4,5-trimethoxyphenyl)-alkancarbonsäuren (IX, XI) gewinnen. Die erfolgreich durchgeführte Synthese des -(p-Dimethylaminophenylimino)--keto--(3,4,5-trimethoxyphenyl)-valeriansäurenitrils (VIIIc) läßt auch die geplante Synthese von -(p-Dimethylaminophenylimino)--keto--[2,3,4,4-tetramethoxydiphenylyl-(6)]-valeriansäurenitril und der entsprechenden -Keto-säure (V, [H statt Br]) als hoffnungsvoll erscheinen.     

Correctionto Chin .J .Chem .2002,20,851— 857

Ａｆｔｅｒｏｕｒａｒｔｉｃｌｅｔｉｔｌｅｄ“Ｈｙｄｒｏｔｈｅｒｍａｌｓｙｎｔｈｅｓｅｓ ,ｓｕｐｒａｍｏｌｅｃｕｌａｒｓｔｒｕｃｔｕｒｅｓａｎｄｔｈｅｔｈｉｒｄ ｏｒｄｅｒｎｏｎ ｌｉｎｅａｒｏｐｔｉｃａｌｐｒｏｐｅｒｔｉｅｓｏｆｔｈｒｅｅｃｏｐｐｅｒ(Ｉ)ｈａｌｉｄｅａｍｉｎｅｃｏｍ ｐｌｅｘｅｓｃｏｎｎｅｃｔｅｄｖｉａｓｅｃｏｎｄａｒｙｂｏｎｄｉｎｇｉｎｔｅｒａｃｔｉｏｎｓ”ｉｓｐｕｂｌｉｓｈｅｄｉｎＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＣｈｅｍｉｓｔｒｙ 2 0 0 2 ,2 0 ,85 1— 85 7,ａｎａｄｖｉｃｅｆｒｏ…     

Über die roten Anile. 2. Mitt.

Zusammenfassung Bei der Spaltung des -(p-Dimethylaminophenylimino)--keto--(3,4,5-trimethoxyphenyl)-valeriansäurenitrils (V) mit Chlorwasserstoffsäure entsteht die -Keto--(3,4,5-trimethoxyphenyl)-buttersäure (VII) und nicht, wie infolge des Versagens einiger typischen -Ketocarbonsäurereaktionen vermutet wurde, die 3-Hydroxy-4,5,6-trimethoxy-indan-3-carbonsäure.1. Mitt.:J. Michalský undL. Sadílek, Mh. Chem.90, 171 (1959).