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Die Kristallstruktur von Lithiummesitolat [{LiOC 6 H 2 ‐2,4,6‐(CH 3 ) 3 } 4 (THF) 3 ]
Author(s) -
Thiele K.,
Görls H.,
Seidel W.
Publication year - 1998
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199809)624:9<1391::aid-zaac1391>3.0.co;2-j
Subject(s) - monoclinic crystal system , crystallography , chemistry , crystal structure , molecule , bond length , stereochemistry , organic chemistry
X‐Ray Structure of [{LiOC 6 H 2 ‐2,4,6‐(CH 3 ) 3 } 4 (THF) 3 ] The title compound crystallized from a THF/OEt 2 solution. Its crystal structure (monoclinic, P2 1 /c, a = 21.362(3), b = 13.441(2), c = 17.188(2) Å, β = 98.39(1)°, Z = 4, R = 0,0911, wR 2 = 0,2562) is built up by cuban‐like tetrameric units. Three of the four Li cations attain a coordination number of four by binding to an additional THF molecule. Li(4) without THF coordination has a short distance to one ortho ‐methyl group (Li(4)…C(27) 2.669(10) Å). The Li–O ph bonding distances vary from 1.869(10) to 2.051(10) Å (average 1.97 Å); the average bonding distance for Li–O THF is 2.012(10) Å. Averaged bonding angles for Li–O ph –Li′ and O ph –Li–O′ ph amount to 84.4(4)° and 95.4(4)°, respectively. The Li…Li distances significantly differ from each other. They range from 2.556(12) to 2.739(11) Å (average 2.65(1) Å).