Reaction of copper powder, dibenzoyl peroxide and 2-amino-4methyl-5-ethoxycarbonyl thiazole (amet) by refluxing in acetone yielded the dinuclearcopper(Ⅱ) complex Cu2 (μ-PhCOO)4 (amet)2- 2CH3COCH3. Crystal structure ...Reaction of copper powder, dibenzoyl peroxide and 2-amino-4methyl-5-ethoxycarbonyl thiazole (amet) by refluxing in acetone yielded the dinuclearcopper(Ⅱ) complex Cu2 (μ-PhCOO)4 (amet)2- 2CH3COCH3. Crystal structure determination showed that each copper atom is coordinated by four bridged benzoxy and oneamet molecule with an M-M bond (Cu-Cu (A) = 2.6899 (7 ) ), therefore the coor-dination environment around the copper center is a distorted square pyramid with N(1)at the apical position. Blocks of Cu2 (μ-PhCOO)4 (amet)2·2CH3COCH3 crystallize inthe triclinic space group Ph, with Mr= 1100.14, a= 9. 631 (1), b=10. 446 (2), c=12. 758(2) ; a=91. 31 (1), β=95. 50(1),γ= 94. 87(1)°, V=1272. 4(3), Z=1, Dc= 1. 436 g/cm3, F(000) = 570, μ=0. 986 mm-1 and R=0.033, Rw=0.049.The IR spectra, which are of great interest since the molecule has ketone, ester andcarboxylate group simultaneously, are also discussed.展开更多
Allanite and REE bearing minerals are primum fama report from migmatite gneisses,plutonic Amet granite and intrusive alkaline rocks of Rajasthan,and these minerals are important for establishing REE deposit.Allanite t...Allanite and REE bearing minerals are primum fama report from migmatite gneisses,plutonic Amet granite and intrusive alkaline rocks of Rajasthan,and these minerals are important for establishing REE deposit.Allanite taken from host migmatite and granite have been analysed along with host rocks containing REE minerals,both of which contain appreciably high amount ofΣREE and Th.Allanite phases identified are CaO and Ce2O3 rich with positive correlation of silica and alumina.As silica proportion decreases andΣREE increases,allanite changes to britholite and thorite indicating a role of fluid in its crystallization.The chondrite normalized REE in migmatite gneiss and allanite mineral is compatible indicating a primary nature of allanite.The carrier of REE minerals is envisaged as the alkaline intrusives which deposited their REE minerals during ascent of magma from deeper source.Chemico-mineralogical study of Allanite and its hosts suggest possible reaction between a REE bearing fluid rich in P and F brought up by alkaline rocks,and the silicate minerals,mainly biotite and hornblende of the migmatite gneiss and Amet granite.The allanite in migmatite gneiss and granite may prove to be a sumptuous deposit of REE minerals in India,and similar terrains elsewhere.展开更多
文摘Reaction of copper powder, dibenzoyl peroxide and 2-amino-4methyl-5-ethoxycarbonyl thiazole (amet) by refluxing in acetone yielded the dinuclearcopper(Ⅱ) complex Cu2 (μ-PhCOO)4 (amet)2- 2CH3COCH3. Crystal structure determination showed that each copper atom is coordinated by four bridged benzoxy and oneamet molecule with an M-M bond (Cu-Cu (A) = 2.6899 (7 ) ), therefore the coor-dination environment around the copper center is a distorted square pyramid with N(1)at the apical position. Blocks of Cu2 (μ-PhCOO)4 (amet)2·2CH3COCH3 crystallize inthe triclinic space group Ph, with Mr= 1100.14, a= 9. 631 (1), b=10. 446 (2), c=12. 758(2) ; a=91. 31 (1), β=95. 50(1),γ= 94. 87(1)°, V=1272. 4(3), Z=1, Dc= 1. 436 g/cm3, F(000) = 570, μ=0. 986 mm-1 and R=0.033, Rw=0.049.The IR spectra, which are of great interest since the molecule has ketone, ester andcarboxylate group simultaneously, are also discussed.
文摘Allanite and REE bearing minerals are primum fama report from migmatite gneisses,plutonic Amet granite and intrusive alkaline rocks of Rajasthan,and these minerals are important for establishing REE deposit.Allanite taken from host migmatite and granite have been analysed along with host rocks containing REE minerals,both of which contain appreciably high amount ofΣREE and Th.Allanite phases identified are CaO and Ce2O3 rich with positive correlation of silica and alumina.As silica proportion decreases andΣREE increases,allanite changes to britholite and thorite indicating a role of fluid in its crystallization.The chondrite normalized REE in migmatite gneiss and allanite mineral is compatible indicating a primary nature of allanite.The carrier of REE minerals is envisaged as the alkaline intrusives which deposited their REE minerals during ascent of magma from deeper source.Chemico-mineralogical study of Allanite and its hosts suggest possible reaction between a REE bearing fluid rich in P and F brought up by alkaline rocks,and the silicate minerals,mainly biotite and hornblende of the migmatite gneiss and Amet granite.The allanite in migmatite gneiss and granite may prove to be a sumptuous deposit of REE minerals in India,and similar terrains elsewhere.
