51
|
|
52
|
Reger DL, Wright TD, Little CA, Lamba JJ, Smith MD. Control of the stereochemical impact of the lone pair in lead(II) tris(pyrazolyl)methane complexes. Improved preparation of Na[B[3,5-(CF3)2C6H3]4]. Inorg Chem 2001; 40:3810-4. [PMID: 11442381 DOI: 10.1021/ic0100121] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of Pb(acac)2 with 2 equiv of [H(Et2O)2][B[3,5-(CF3)2C6H3]4] (HBAr(f)) in CH2Cl2 followed by addition of 2 equiv of either HC(pz)3 or HC(3,5-Me2pz)3 (pz = pyrazolyl ring) leads to the formation of [Pb[HC(pz)3]2][B[3,5-(CF3)2C6H3]4]2 (1) and [Pb[HC(3,5-Me2pz)3]2][B[3,5-(CF3)2C6H3]4]2 (2), respectively. The cation in 1 has a distorted octahedral structure with a stereochemically active lone pair on lead(II). In contrast, the cation in 2 is trigonally distorted octahedral with the lone pair on the lead(II) clearly stereochemically inactive. The driving force for this cation to have a stereochemically inactive lone pair is that in this geometric arrangement the interligand distances between adjacent 3-position methyl groups are close to 4.0 A, the sum of the van der Waals radii of two methyl groups. To facilitate this chemistry, the synthesis of Na[B[3,5-(CF3)2C6H3]4], needed to prepare HBAr(f), has been dramatically improved. The main change is to add NaBF4 to the reaction mixture before forming the Grignard from the reaction of magnesium and 3,5-(CF3)2C6H3Br. The Grignard reacts with the NaBF4 as it forms, reducing the danger of explosion and leading to a higher isolated yield of the product. Crystallographic information: 1 is triclinic, P1, a = 13.0133(6) A, b = 17.2210(7) A, c = 24.7634(11) A, alpha = 71.7300(10) degrees, beta = 82.3630(10) degrees, gamma = 70.5120(10) degrees, Z = 2; 2 is triclinic, P1, a = 12.756(4) A, b = 13.469(4) A, c = 17.160(5) A, alpha = 82.454(7) degrees, beta = 89.904(8) degrees, gamma = 72.995(7) degrees, Z = 1.
Collapse
Affiliation(s)
- D L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | | | | | | | | |
Collapse
|
53
|
Westerhausen M, Gückel C, Mayer P. Synthesis and Structure of a Dimeric Alkyldibariumtriszincate with a Tetraanionic Triszincate Ligand and a Unique Central Ba4Zn2C6 Moiety. Angew Chem Int Ed Engl 2001; 40:2666-2668. [DOI: 10.1002/1521-3773(20010716)40:14<2666::aid-anie2666>3.0.co;2-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2001] [Indexed: 11/08/2022]
|
54
|
Westerhausen M, Gückel C, Mayer P. Synthese und Struktur eines dimeren Alkyldibariumtriszinkates mit tetraanionischem Triszinkat-Liganden und einem ungewöhnlichen zentralen Ba4Zn2C6-Doppelwürfel. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010716)113:14<2736::aid-ange2736>3.0.co;2-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
55
|
Smith JD, Hanusa TP. Trends in the Structures and Energetics of the Group 14 Metallocenes (C5H5)2M (M = Si−Pb): A Density Functional Theory Study. Organometallics 2001. [DOI: 10.1021/om010213c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Dominic Smith
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - Timothy P. Hanusa
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| |
Collapse
|
56
|
Westerhausen M, Gückel C, Schneiderbauer S, Nöth H, Hosmane NS. Der erste Barium-Carborat-Komplex: Synthese und strukturelle Charakterisierung. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010518)113:10<1959::aid-ange1959>3.0.co;2-i] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
57
|
Westerhausen M, Gückel C, Schneiderbauer S, Nöth H, Hosmane NS. The First Barium-Carborate Complex: Synthesis and Structural Investigation. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3773(20010518)40:10<1902::aid-anie1902>3.0.co;2-v] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
58
|
Knapp V, Müller G. Cyclopentadienylfreie Calciumalkyle mit Heteroelement-substituierten anionischen Phosphanliganden: Synthese und Struktur eines Trialkylcalcates(II) und eines Organocalcium-Heterocubans. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010105)113:1<187::aid-ange187>3.0.co;2-b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
59
|
Knapp V, Müller G. Cyclopentadienyl-Free Calcium Alkyls with Heteroelement-Substituted Anionic Phosphane Ligands: Synthesis and Structure of a Trialkyl Calcate(II) and of an Organocalcium Heterocubane. Angew Chem Int Ed Engl 2001; 40:183-186. [DOI: 10.1002/1521-3773(20010105)40:1<183::aid-anie183>3.0.co;2-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2000] [Indexed: 11/06/2022]
|
60
|
|
61
|
Thornberry MP, Slebodnick C, Deck PA, Fronczek FR. Structural and Electronic Effects of Pentafluorophenyl Substituents on Cyclopentadienyl Complexes of Fe, Co, Mn, and Re1. Organometallics 2000. [DOI: 10.1021/om000798v] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Carla Slebodnick
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
| | - Paul A. Deck
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804
| |
Collapse
|
62
|
Westerhausen M, Gückel C, Warchhold M, Nöth H. Synthesis and Structure of Semi(tetrahydrofuran-O)bispotassium Bis(2,3,4,5-tetraethylstibolide). Organometallics 2000. [DOI: 10.1021/om000161b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Westerhausen
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 9 (House D), D-81377 Munich, Germany
| | - Christian Gückel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 9 (House D), D-81377 Munich, Germany
| | - Marcus Warchhold
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 9 (House D), D-81377 Munich, Germany
| | - Heinrich Nöth
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 9 (House D), D-81377 Munich, Germany
| |
Collapse
|
63
|
Burkey DJ, Hanusa TP, Huffman JC. Stereochemical activity of the metal-centered lone electron pair in group 14 metallocenes. Crystal structure of the linear sandwich complex [C5(iPr)3H2]2Pb. Inorg Chem 2000; 39:153-5. [PMID: 11229023 DOI: 10.1021/ic9905401] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D J Burkey
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | | | | |
Collapse
|
64
|
Jutzi P, Burford N. Structurally Diverse pi-Cyclopentadienyl Complexes of the Main Group Elements. Chem Rev 1999; 99:969-990. [PMID: 11848997 DOI: 10.1021/cr941099t] [Citation(s) in RCA: 396] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Jutzi
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4J3, Canada
| | | |
Collapse
|
65
|
Evans WJ, Johnston MA, Greci MA, Ziller JW. Synthesis, Structure, and Reactivity of Unsolvated Triple-Decked Bent Metallocenes of Divalent Europium and Ytterbium. Organometallics 1999. [DOI: 10.1021/om980762r] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- William J. Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - Matthew A. Johnston
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - Michael A. Greci
- Department of Chemistry, University of California, Irvine, California 92697-2025
| | - Joseph W. Ziller
- Department of Chemistry, University of California, Irvine, California 92697-2025
| |
Collapse
|
66
|
|
67
|
Westerhausen M, Makropoulos N, Wieneke B, Karaghiosoff K, Nöth H, Schwenk-Kircher H, Knizek J, Seifert T. Substituted Cyclopentadienides of Magnesium from the Reaction of Dialkylmagnesium with Fulvenes. Eur J Inorg Chem 1998. [DOI: 10.1002/(sici)1099-0682(199807)1998:7<965::aid-ejic965>3.0.co;2-a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
68
|
Westerhausen M, Digeser MH, Nöth H, Seifert T, Pfitzner A. A Unique Barium−Carbon Bond: Mechanism of Formation and Crystallographic Characterization. J Am Chem Soc 1998. [DOI: 10.1021/ja980535g] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Westerhausen
- Contribution from the Institut für Anorganische Chemie, Ludwig-Maximilians-Universität, Meiserstrasse 1, D-80333 München, Germany, and Institut für Anorganische Chemie, Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany
| | - Matthias H. Digeser
- Contribution from the Institut für Anorganische Chemie, Ludwig-Maximilians-Universität, Meiserstrasse 1, D-80333 München, Germany, and Institut für Anorganische Chemie, Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany
| | - Heinrich Nöth
- Contribution from the Institut für Anorganische Chemie, Ludwig-Maximilians-Universität, Meiserstrasse 1, D-80333 München, Germany, and Institut für Anorganische Chemie, Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany
| | - Thomas Seifert
- Contribution from the Institut für Anorganische Chemie, Ludwig-Maximilians-Universität, Meiserstrasse 1, D-80333 München, Germany, and Institut für Anorganische Chemie, Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany
| | - Arno Pfitzner
- Contribution from the Institut für Anorganische Chemie, Ludwig-Maximilians-Universität, Meiserstrasse 1, D-80333 München, Germany, and Institut für Anorganische Chemie, Universität Siegen, Adolf-Reichwein-Strasse, D-57068 Siegen, Germany
| |
Collapse
|
69
|
|
70
|
Overby JS, Hanusa TP, Young VG. Redetermination of the Zigzag Modification of Plumbocene at 173 K. Inorg Chem 1998; 37:163-165. [PMID: 11670280 DOI: 10.1021/ic970980x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jason S. Overby
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, and Chemistry Department, University of Minnesota, Minneapolis, Minnesota 55455
| | | | | |
Collapse
|
71
|
Burkey DJ, Hays ML, Duderstadt RE, Hanusa TP. Synthesis, Structures, and Properties of “Encapsulated” Iron and Cobalt Metallocenes with Highly Isopropylated Cyclopentadienyl Rings. Organometallics 1997. [DOI: 10.1021/om960740+] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
72
|
Reger DL, Collins JE, Rheingold AL, Liable-Sands LM, Yap GPA. Syntheses of Cationic Lead(II) and Tin(II) Complexes Containing Tris(pyrazolyl)methane Ligands. Control of Stereochemistry by Variation in Ligand Substitution. Inorg Chem 1997. [DOI: 10.1021/ic961030z] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
73
|
Harder S, Lutz M, Straub AWG. Silicon-Bridged Alkali-Metal and Alkaline-Earth-Metal Metallocene Complexes. Organometallics 1997. [DOI: 10.1021/om960587j] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sjoerd Harder
- Universität Konstanz, Postfach 5560, M738, D-78434 Konstanz, Germany
| | - Martin Lutz
- Universität Konstanz, Postfach 5560, M738, D-78434 Konstanz, Germany
| | | |
Collapse
|
74
|
Burkey DJ, Hanusa TP. Effects of steric strain on the bonding in zinc metallocenes: the structure of [(C3H7)4C5H]2Zn. J Organomet Chem 1996. [DOI: 10.1016/0022-328x(95)05952-l] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
75
|
Sitzmann H, Boese R, Stellberg P. Meso- undRac-Decaisopropylstannocen: Stereoisomerie bedingt durch parallele Anordnung zweier Pentaisopropylcyclopentadienyl-Liganden in Schaufelrad-Konformation. Z Anorg Allg Chem 1996. [DOI: 10.1002/zaac.19966220432] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
76
|
Reger DL, Collins JE, Layland R, Adams RD. A Six-Coordinate Tris(3,5-dimethyl-1-pyrazolyl)methane-Thallium(I) Complex with a Stereochemically Inactive Lone Pair: Syntheses and Solid State Structures of {[HC(3,5-Me(2)pz)(3)](2)Tl}PF(6) and {[HC(3,5-Me(2)pz)(3)]Tl}PF(6) (pz = Pyrazolyl). Inorg Chem 1996; 35:1372-1376. [PMID: 11666335 DOI: 10.1021/ic951167+] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The addition of the tris(pyrazolyl)methane ligand HC(3,5-Me(2)pz)(3) (pz = pyrazolyl ring) to a THF solution of TlPF(6) results in the immediate precipitation of {[HC(3,5-Me(2)pz)(3)](2)Tl}PF(6). The structure has been determined crystallographically. The arrangement of the nitrogen donor atoms about the thallium is best described as a trigonally distorted octahedron. The thallium atom sits on a crystallographic center of inversion; thus the planes formed by the three nitrogen donor atoms of each ligand are parallel. The Tl-N bond distances range from 2.891(5) to 2.929(5) Å (average = 2.92) Å. The lone pair on thallium is clearly stereochemically inactive and does not appear to influence the structure. The pyrazolyl rings are planar, but are tilted with respect to the thallium atom so as to open up the N.N intraligand bite distances. The thallium(I) complex with a ligand to metal ratio of 1/1, {[HC(3,5-Me(2)pz)(3)]Tl}PF(6), is prepared in acetone by the reaction of equimolar amounts of HC(3,5-Me(2)pz)(3) and TlPF(6). The structure of the cation is a trigonal pyramid, with Tl-N bond distances that range from 2.64(1) to 2.70(1) Å (average = 2.67) Å. Pyrazolyl ring tilting is also observed in this complex, but the degree of tilting is smaller. Crystal data for {[HC(3,5-Me(2)pz)(3)](2)Tl}PF(6): monoclinic, P2(1)/c, a = 9.210(6) Å, b = 13.36(1) Å, c = 16.067(8) Å, beta = 92.48(5) degrees, V = 1975(2) Å(3), Z = 2, R = 0.029. For {[HC(3,5-Me(2)pz)(3)]Tl}PF(6): monoclinic, P2(1)/n, a = 10.685(2) Å, b = 16.200(5) Å, c = 13.028(3) Å, beta = 94.02(2) degrees, V = 2249.6(8) Å(3), Z = 4, R = 0.042.
Collapse
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | | | | | | |
Collapse
|
77
|
Harder S, Prosenc MH. Das schwerste Alkalimetallocen: Struktur eines anionischen Caesocen-Tripeldeckers. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080122] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
78
|
Substituent Effects as Probes of Structure and Bonding in Mononuclear Metallocenes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 1996. [DOI: 10.1016/s0065-3055(08)60533-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
|