Complexes [(η8-C8H8)LnCl(OC4H8)2]2, (Ln = Pr(1), Nd(2)) both crystallize in monoclinic space group P21/n with cell dimensions for 1: a = 11. 860(3), b=12. 697(3), c=12. 161(2)(?), β=111. 88(2)°, V= 1699. 50(69)...Complexes [(η8-C8H8)LnCl(OC4H8)2]2, (Ln = Pr(1), Nd(2)) both crystallize in monoclinic space group P21/n with cell dimensions for 1: a = 11. 860(3), b=12. 697(3), c=12. 161(2)(?), β=111. 88(2)°, V= 1699. 50(69) (?)3, Dc=1. 66gcm-3,Z==2 (4 monomers), μc=30. 2cm-1, F (000) = 848, the final R = 0. 031, Rw = 0. 032 for 2303 independent reflections with I≥ 3σ(I) ; and for 2: a=11. 834(4), b = 12. 666(5), c=12. 166(3)(?), β=111. 73(2)°, V= 1694. 03 (99)(?)3, Dc= 1. 68g. cm-3, Z = 2 (4 monomers), μc=32. 3cm-1, F(000) = 852, R=Rw = 0. 035 for 3487 independent reflections with I≥3σ(I). In each complex, there are two Ln atoms in a dimeric unit which are bridged asymmetrically by two chloride ions with Ln - Cl bond lengths of 2. 847(2) and 2. 924(2)(?) for 1, or 2. 836(1) and 2. 919(2)(?) for 2. The cyclooctatetraene COT dianion ring is planar with eightfold molecular symmetry and an average C -C bond length of 1. 392(?). It is symmetrically coordinated to the Ln atom with an average Ln - C distance展开更多
In recent years,the organometallic ehemistry of the lanthanide metals in low oxidation states has beenactively investigated.The synthesis of the low一valent lanthanide eomPlexes has the signifieant meanings ontheory a...In recent years,the organometallic ehemistry of the lanthanide metals in low oxidation states has beenactively investigated.The synthesis of the low一valent lanthanide eomPlexes has the signifieant meanings ontheory and praeti展开更多
In order to stabilize the organolanthanide chlorides or dichlorides, some substituted cyclopentadienes are used as ligands. At present, several kinds of substituted cyclopentadienes, e. g. CH<sub>3</sub>C&...In order to stabilize the organolanthanide chlorides or dichlorides, some substituted cyclopentadienes are used as ligands. At present, several kinds of substituted cyclopentadienes, e. g. CH<sub>3</sub>C<sub>5</sub>H<sub>5</sub>, C<sub>5</sub>（CH<sub>3</sub>）<sub>5</sub>H, （CH<sub>3</sub>）<sub>3</sub>SiC<sub>5</sub>H<sub>5</sub>, t-C<sub>4</sub>H<sub>9</sub>C<sub>5</sub>H<sub>5</sub>, CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>- C<sub>5</sub>H<sub>5</sub>, etc., have been used as the ligands. Benzylcyclopentadiene was synthesized in 1936. So far, however, very few studies on benzylcyclopentadiene as a ligand used in organometallic chemistry have been found. Only benzylcyclopentadienyl iron and uranium complexes have been reported. Recently, we synthesized benzylcyclopentadienyl lanthanide dichlorides. In this note, we report the syntheses and crystal structures of bisbenzylcyclopentadienyl lanthanide chlorides.展开更多
基金This project was supported by Chinese National Foundation of Natural ScienceFoundation of Laboratory of Rarc Earth Chemistry and Physics.
文摘Complexes [(η8-C8H8)LnCl(OC4H8)2]2, (Ln = Pr(1), Nd(2)) both crystallize in monoclinic space group P21/n with cell dimensions for 1: a = 11. 860(3), b=12. 697(3), c=12. 161(2)(?), β=111. 88(2)°, V= 1699. 50(69) (?)3, Dc=1. 66gcm-3,Z==2 (4 monomers), μc=30. 2cm-1, F (000) = 848, the final R = 0. 031, Rw = 0. 032 for 2303 independent reflections with I≥ 3σ(I) ; and for 2: a=11. 834(4), b = 12. 666(5), c=12. 166(3)(?), β=111. 73(2)°, V= 1694. 03 (99)(?)3, Dc= 1. 68g. cm-3, Z = 2 (4 monomers), μc=32. 3cm-1, F(000) = 852, R=Rw = 0. 035 for 3487 independent reflections with I≥3σ(I). In each complex, there are two Ln atoms in a dimeric unit which are bridged asymmetrically by two chloride ions with Ln - Cl bond lengths of 2. 847(2) and 2. 924(2)(?) for 1, or 2. 836(1) and 2. 919(2)(?) for 2. The cyclooctatetraene COT dianion ring is planar with eightfold molecular symmetry and an average C -C bond length of 1. 392(?). It is symmetrically coordinated to the Ln atom with an average Ln - C distance
文摘In recent years,the organometallic ehemistry of the lanthanide metals in low oxidation states has beenactively investigated.The synthesis of the low一valent lanthanide eomPlexes has the signifieant meanings ontheory and praeti
文摘In order to stabilize the organolanthanide chlorides or dichlorides, some substituted cyclopentadienes are used as ligands. At present, several kinds of substituted cyclopentadienes, e. g. CH<sub>3</sub>C<sub>5</sub>H<sub>5</sub>, C<sub>5</sub>（CH<sub>3</sub>）<sub>5</sub>H, （CH<sub>3</sub>）<sub>3</sub>SiC<sub>5</sub>H<sub>5</sub>, t-C<sub>4</sub>H<sub>9</sub>C<sub>5</sub>H<sub>5</sub>, CH<sub>3</sub>CH<sub>2</sub>CH<sub>2</sub>- C<sub>5</sub>H<sub>5</sub>, etc., have been used as the ligands. Benzylcyclopentadiene was synthesized in 1936. So far, however, very few studies on benzylcyclopentadiene as a ligand used in organometallic chemistry have been found. Only benzylcyclopentadienyl iron and uranium complexes have been reported. Recently, we synthesized benzylcyclopentadienyl lanthanide dichlorides. In this note, we report the syntheses and crystal structures of bisbenzylcyclopentadienyl lanthanide chlorides.
