Christa Siebert – författare

The present volume in the organogermanium series describes mononuclear compounds containing only germanium-carbon and germanium-hydrogen bonds (Chapter 1.3). Germanium hydrides with other additional non-carbon ligands, such as halogen or oxygen­ bonded groups, appear in later chapters according to the Gmelin principle of the last posi­ tion. Compounds with Ge-H and Ge-O bonds have already been described in Volume 5, Section 1.5.1.4, pp. 50/62. The present volume covers the literature to the end of 1992 and includes many references up to 1994. The nomenclature recommended by IUPAC has been generally adhered to. However, compound names were largely avoided, as most of the compounds are presented in tables and are only identified by their formulas. Many of the data in the tables appear in abbreviated form without units; general explanations are given on pp. X/XI. The volume contains an empirical formula index (p. 327) and a ligand formula index (p.341). The editor wishes to express his gratitude to the former author, Professor J. E. Drake, and to Professor J. Satge for his kind advice and fruitful collaboration. Thanks are due also to Dr. A. R. Pebler for editing the English text and to Mr. H.-G. Karrenberg for drawing the numerous formulas and molecular structures.

The present volume in the organogermanium series describes mononuclear compounds containing only germanium-carbon and germanium-hydrogen bonds (Chapter 1.3). Germanium hydrides with other additional non-carbon ligands, such as halogen or oxygen­ bonded groups, appear in later chapters according to the Gmelin principle of the last posi­ tion. Compounds with Ge-H and Ge-O bonds have already been described in Volume 5, Section 1.5.1.4, pp. 50/62. The present volume covers the literature to the end of 1992 and includes many references up to 1994. The nomenclature recommended by IUPAC has been generally adhered to. However, compound names were largely avoided, as most of the compounds are presented in tables and are only identified by their formulas. Many of the data in the tables appear in abbreviated form without units; general explanations are given on pp. X/XI. The volume contains an empirical formula index (p. 327) and a ligand formula index (p.341). The editor wishes to express his gratitude to the former author, Professor J. E. Drake, and to Professor J. Satge for his kind advice and fruitful collaboration. Thanks are due also to Dr. A. R. Pebler for editing the English text and to Mr. H.-G. Karrenberg for drawing the numerous formulas and molecular structures.

"Organoiron Compounds" 8 13 (present volume) systematicaLLy covers the Literature through the end of 1986, and includes additional references up to 1988. The volume continues Series 8 (volumes 81 to 812 already pubLished) on the mononucle- ar organoiron compounds, whereas Series A (volumes A 1 to A8 already pubLished) is de- voted to the ferrocenes and Series C (volumes C1 to C5 and C7 already pubLished) treats organoiron compounds with two or more Fe atoms in the molecule. Se ries 8 so far includes mononuclear organoiron compounds as follows: "Eisen-Organische Verbindungen" 8 1 (1976), 82 (1978), 83 (1979) Sections 1 to 1.1.4.8 on cr-compounds and carbonyl compounds. "Eisen-Organische Verbindungen" 84 (1978) Sections 1.1.5 to 1.2.3.2.3 on isonitrile and carbene compounds and on compounds with Ligands bonded by two C atoms eL Ligands) to the Fe atom. "Eisen-Organische Verbindungen" 85 (1978) Sections 1.3 to 1.3.6 on compounds with Ligands bonded by three C atoms (3L Ligands) to the Fe atom. "Organoiron Compounds" 86 (1981),87 (1981),88 (1985),89 (1985),810 (1986) Sections 1.4 to 1.4.3.4 on compounds with Ligands bonded by four C atoms (4L ligands) to the Fe atom."Organoiron Compounds" 811 (1983),812 (1984) Sections 1.5 to 1.5.2.3.16.1.5 on compounds with Ligands bonded by five C atoms (5L Ligands) to the Fe atom up to the first subsections concerning compounds of the type C5H5Fe(COhR.

The present volume opens the Gmelin series on organogermanium compounds, that is, those compounds containing at least one germanium-to-carbon bond. This whole series is being coordinated by Professor J. Satge of the Universite Paul Sabatier in Toulouse. Germanium is of historical interest because its existence was predicted by Newlands in 1864 and by Mendeleeff in 1871 although it was not isolated until1887 by Winkler. Mendeleeff''s predictions of the properties of germanium and its compounds by comparison with what was known of the chemistry of its neighbors, silicon and tin, proved remarkably accurate and included predictions of the existence of organic derivatives GeR and of their properties. 4 Although significant applications are as yet lacking for organogermanium compounds in contrast to organo-silicon, -tin, and -lead compounds there has been considerable interest in the parallel development of its chemistry. Up to 1983 about 1500 publications have appeared on organogermanium chemistry. The material of the present series will be grouped in a similar way as for the organotin series beginning with compounds containing only one germanium atom (mononuclear com­ pounds) and continuing with binuclear up to polynuclear compounds. Within each group the compounds are arranged by the kind of non-carbon substituents rather than by following the usual Gmelin principle of the last position using the Gmelin system of elements.